a. Perimeter
b. Volume
c.Suface Area
EASY POINTS Double the product of 6y and 3bc
Answer:
12y and 6bc
Step-by-step explanation:
multiply by 2
The product of [tex]6y[/tex] and [tex]3bc[/tex] after doubling would be as follows:
[tex]36bcy[/tex]
Variable
A variable is a symbol and placeholder for a changing amount or any mathematical object.An algebraic expression is one that is composed of integer constants, variables, and algebraic operations.Product of [tex]6y,3bc=18bcy[/tex]
Double the product of [tex]6y,3bc=2(18bcy)[/tex]
[tex]=\textbf{36bcy}[/tex]
Thus, it is the correct answer.
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Which polynomial represents a sum of cubes?
x^3+9
4x^3+1
8x^3+1
64x^3-27
Which of the following polynomials represents a difference of squares?
4x^2-8
9x^2+16
16x^2-2
49x^2-25
Answer:
1) The polynomial [tex]8x^3+1[/tex] represents a sum of cubes
2) The polynomial [tex]49x^2-25[/tex] represents a difference of squares
Step-by-step explanation:
1) To find the polynomials represents a sum of cubes :
[tex]8x^3+1[/tex] represents a sum of cubes
For [tex]8x^3+1[/tex]
[tex]=2^3x^3+1^3[/tex]
[tex]=(2x)^3+1^3[/tex]
Therefore [tex]8x^3+1=(2x)^3+1^3[/tex]
Therefore [tex]8x^3+1[/tex] represents a sum of cubes
2)To find the polynomials represents a difference of squares :
[tex]49x^2-25[/tex] represents a difference of squares
For [tex]49x^2-25[/tex]
[tex]=7^2x^2-5^2[/tex]
[tex]=(7x)^2-5^2[/tex]
Therefore [tex]49x^2-25=(7x)^2-5^2[/tex]
Therefore [tex]49x^2-25[/tex] represents a difference of squares
Nancy and Matilda are 60 miles apart, cycling towards each other on the same road. Matilda rides 12 miles per hour and Nancy rides 8 miles per hour. In how many hours will they meet?
Nancy and Matilda will meet in 3 hours.
Step-by-step explanation:
Given,
Distance to cover = 60 miles
Speed of Matilda = 12 miles per hour
Speed of Nancy = 8 miles per hour
Combined speed of Nancy and Matilda = 8+12 = 20 miles per hour
Let,
x be the time taken by them
Distance = Speed * Time
[tex]60=20*x\\60=20x\\20x=60[/tex]
Dividing both sides by 20
[tex]\frac{20x}{20}=\frac{60}{20}\\x=3[/tex]
Nancy and Matilda will meet in 3 hours.
Keywords: distance, speed
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In 3 hours Nancy and Matilda meet.
Given
Nancy and Matilda are 60 miles apart, cycling towards each other on the same road.
Matilda rides 12 miles per hour and Nancy rides 8 miles per hour.
What is speed?Speed is defined as the ratio of distance and time.
The time will take to meet Nancy and Matilda is given by;
[tex]\rm \dfrac{12}{8}=\dfrac{x}{60}\\\\8 \times x=60\times 12\\\\8x=720\\\\x = \dfrac{720}{8}\\\\x=90[/tex]
Therefore.
The time taken to meet them is;
[tex]\dfrac{12}{8}+\dfrac{90}{60}\\\\1.5+1.5= 3[/tex]
Hence, in 3 hours will they meet.
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Round tables seating 8 people and rectangular tables seating 12 people are being used at a banquet for 8th graders. The ratio of round tables to rectangular tables is 2 to 1. How many tables are used to seat 336 students at the banquet, if no table has an empty seat?
Answer:
36 tables are used to seat the students at the banquet: 12 rectangular and 24 round.
Step-by-step explanation:
1. Let's review the information given to us to answer the question correctly:
Round tables = 8 seats
Rectangular tables = 12 seats
Ratio of round tables to rectangular tables = 2:1
Number of students = 336
2. How many tables are used to seat 336 students at the banquet, if no table has an empty seat?
x = Number of rectangular tables
2x = Number of round tables
Let's solve for x, using this equation:
12x + 8 (2x) = 336
12x + 16x = 336
28x = 336
x = 336/28
x = 12 ⇒ 2x = 24
12 + 24 = 36
36 tables are used to seat the students at the banquet: 12 rectangular and 24 round.
Answer:
36
Step-by-step explanation:
Are priya’s and Hans expressions each equivalent to 8y - 24? explain your reasoning
Answer:
Step-by-step explanation:
8y-24=8(y-3)
What’s the average of 14,17,22,27
Answer:
20
Step-by-step explanation:
Average =
sum of scores/number of score
= 14 + 17 + 22 + 27 / 4
= 80/4
= 20
A professor announced to her class that the average score for the 37 exams received was 86. She later discovered
three additional exams with scores of 76, 81 and 97. These exams were not included in the class average she
reported to the class. Is it possible to calculate the new class average? If so, what is it? If not, justify why.
Answer:
New average = 85.9.
Step-by-step explanation:
Yes, the new class average can be calculated.
The New total of the scores = 37*86 + 76 + 81 + 97
= 3436.
The new total of examinations sat = 37 + 3 = 40.
Therefore the new class average = 3436 / 40
= 85.9
Terri and Donna both sell crafts at two different craft shows each weekend. Terri is charged a 5% commission on the amount of money she earns and pays $35 for her booth. Donna is charged a 3% commission on the amount of money she earns and pays $55 for her booth.
On the last weekend in November, Terri and Donna both earned the same amount of money at their craft shows. They both paid their respective craft shows the same total amount of money for their booths and commission
Set up a system of equations to model the amount of money Terri and Donna pay each weekend at the craft shows. Let x represent the money earned from sales, let T represent the total amount Terri pays in one weekend, and let D represent the total amount Donna pays in one weekend.
Answer:
T = 0.05x + 35
D = 0.03x + 55
Step-by-step explanation:
i) On the last weekend in November both Terri and Donna earned from sales the amount of x.
ii) Terri pays the amount T = 0.05x + 35
iii) Donna pays the amount D = 0.03x + 55
Factor 9x2 + 6x + 12x + 8
Step-by-step explanation:
9x2= 3 • 3 • x2
6x= 3 • 2 • x
12x= 2 • 2 • 3 • x
8= 2 • 2 • 2
The population of North Carolina in 2010 was 9,535,483 people. The population of South Carolina in 2010 was 4,625,364 people.
a) Approximately how much larger is the population of North Carolina than South Carolina? Show or explain your thinking.
b) Approximately how many times larger is North Carolina’s population than South Carolina’s population? Show or explain your thinking.
a) North Carolina has 4,910,119 more people than South Carolina
b) the population of North Carolina is 2.06 times larger than that of South Carolina
Step-by-step explanation:
a)
Here the question is asking "how much larger is the population of North Carolina than South Carolina". This means that we have to compare the absolute value of the population of North Carolina with the population of South Caroline.
We have:
NC = 9,535,483 is the population of North Carolina
SC = 4,625,364 is the population of South Carolina
In order two compare the two, we have to calculated the difference between NC and SC. Plugging into a calculator, we get:
[tex]NC-SC=9,535,483-4,625,34=4,910,119[/tex]
So, North Carolina has 4,910,119 more people than South Carolina.
b)
In this question, we are asked "how many times larger is North Carolina’s population than South Carolina’s population". This is equivalent to ask what is the ratio between the population of North Carolina to that of South Carolina.
As we said before, we have:
NC = 9,535,483 is the population of North Carolina
SC = 4,625,364 is the population of South Carolina
And by calculating the ratio, we find:
[tex]\frac{NC}{SC}=\frac{9,535,483}{4,625,364}=2.06[/tex]
So, the population of North Carolina is 2.06 times larger than that of South Carolina.
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Answer: the population of North Carolina is 2.06 times larger than that of South Carolina.
Hey can somebody help me with this, I’m having a hard time knowing what it is...???
Answer:
[tex]\left[\begin{array}{cc}0&2\\3&3\\6&4\\9&5\end{array}\right][/tex]
Step-by-step explanation:
+2 means that when c is at 0 w is at 2.
1/3c means that c moves up 3 at a time.
Can someone please help me with this 7th grade math homework
Answer:
1) D
2) A, D, F
3) 3.5 mph
4) equation in explanation $15
Step-by-step explanation:
4) equation: 27.50-12.50
The difference between four times a number and one
The difference between four times a number and one can be expressed as 4x - 1, where "x" represents the number. This expression involves multiplying the number by 4 and then subtracting 1.
The difference between four times a number and one can be succinctly expressed as the result of multiplying that number by four and then subtracting one from the product. In mathematical notation, this difference can be represented as:
4x - 1
Here, "x" represents the unknown number, and we are performing two operations: multiplying it by 4 and subtracting 1 from the result. Let's break this down further:
Four times a number: When you multiply a number by 4, you are essentially scaling it up by a factor of 4. For example, if the number is 5, then four times that number would be 4 * 5 = 20.
Subtracting one: After obtaining the result of four times the number, we subtract 1 from it. In our example, if the number is 5, then after four times the number (20), subtracting 1 results in 19.
So, the difference between four times a number and one is the value obtained after performing these two steps. It's a simple arithmetic expression that can be calculated for any given value of "x."
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Write 79/10 as a mixed number.
[tex]\frac{79}{10}[/tex], which is a complex fraction, can be written as a mixed number resulting in [tex]7\frac{9}{10}[/tex].
What is a mixed number?A mixed number is a combination of a whole number, a numerator and a denominator.
The numerator is always less than the denominator in a mixed number because it has been converted from a complex fraction to its current status as a mixed number.
Mixed numbers are complex fractions, like [tex]\frac{79}{10}[/tex]. Before the conversion, complex fractions are fractions where the numerator is greater than the denominator.
Thus [tex]\frac{79}{10}[/tex] written as a mixed number is [tex]7\frac{9}{10}[/tex].
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Enter the number
15.666666666667
15.666666666667
rounded to the nearest hundredth (two decimal places):
Answer:
15.666666666667=15.67 to the nearest hundredth or to two decimal places.
Step-by-step explanation:
We want to round 15.66666666667 to the nearest hundredth or to two decimal places.
We count two numbers after the decimal place to get:
15.66|6666666667
The next digit is 6
Since 6>5, we round up.
This means we add 1 to the number the hundredth place to get
15.67
What is the answer to 4 4/7
+ 3 6/7
Answer: 8 3/7
Step-by-step explanation:
32/7 + 3 6/7
= 32/7 + 27/7
= 59/7
= 8 3/7
Hope this helps!
Hello! (ﾉ◕ヮ◕)ﾉ*:･ﾟ✧
So you are adding fractions, but not just any fractions, mixed numbers.
So, to start you are gonna wanna turn these mixed numbers into improper fractions.
Here are the steps!
1. Multiply the whole number by the denominator
2. Add that to the numerator
3. Write the number you now have over the original denominator
So 4 4/7 = 32/7
3 6/7 = 27/7
You can only add or subtract fractions with like denominators. This just means denominators with the same number. In our case, we already have like denominators. They are both seven! So the adding process easy. Simply add the numerators and keep the denominators the same!
32 + 27= 59/7
Bam! 59/7 is your answer! If you would like to turn this back into a mixed number, here are the steps:
1. Divide numerator by denominator
2. Put that number as the whole number
3. Use the remainder as the numerator
4. Keep the same denominator
So, 59/7 = 8 3/7
So your answer is 59/7, or, 8 3/7.
Have a great day! And feel free to reply with any questions! (〃^∇^)ﾉ
HELP HELP HELP PLEASE
1. solve the eqation. First combine any like terms on each side of the equation
x-6 = -3+8 the solution is x =
2. Solve. First combine any like terms on each side of the equation.
3w - 8w = 35 w=
3. Solve the equation. First combine any like terms on each side of the equation.
- 4 x - 4 x = 44 - 4 the solution x =
4. Solve the equation. First combine any like terms on each side of the equation -5 -8 = 3x +2 - 2x the solution is x
5. Solve. First multiply to remove the parentheses.
3(3x - 3) = 10x x=
x - 6 = - 3 + 8
x = 5 + 6
x = 11
3w - 8w = 35
- 5w = 35
5w = - 35
w = - 35 : 5
w = - 7
3(3x - 3) = 10x
9x - 9 = 10x
- 9 = 10x - 9x
x = - 9
Answer:
1. x = 11,
2. w = -7,
3. x = -5
4. x = -5
5. x = -9
Step-by-step explanation:
1. x-6 = -3+8
x - 6 = 8 -3
x - 6 = 5
Adding 6 to both sides:
x - 6 + 6 = 5 + 6
x = 11
2. 3w - 8w = 35
3w - 8w = 35
-5w = 35
Divide both sides by -5
-5w/-5 = 35/-5
w = -7
3. - 4 x - 4 x = 44 - 4
- 4 x - 4 x = 44 - 4
-8x = 40
Divide both sides by -8
-8x/-8 = 40/-8
x = -5
4. 5 -8 = 3x +2 - 2x
Collecting like terms and rearranging equation
3x - 2x = 5 - 8 - 2
x = 5 - 10
x = -5
5. 3(3x - 3) = 10x
3(3x - 3) = 10x
Expanding and removing parenthesis
9x - 9 = 10x
Collecting like terms and rearranging equation
10x - 9x = -9
x = -9
Joe gave 1⁄4 of his total candies to his classmates. Then he gave 4/6 of what he had left to his brother when he went home. He then realized that he didn’t give any to his sister, so he gave 25% of the remaining candies to her. After all this, he realized he only had 21 candies left. How many candies did he have in the beginning
Answer:
112 candies
Step-by-step explanation:
Start from the end.
Joe gave 25% of the remaining candies to his sister and has 21 candies left. Then
[tex]21 \ candies - 75\%\\ \\x \ candies - 25\%[/tex]
Write a proportion:
[tex]\dfrac{21}{x}=\dfrac{75}{25}\\ \\75x=21\cdot 25\\ \\x=\dfrac{21}{3}=7[/tex]
Joe gave 7 candies to his sister, so before this he had 21 + 7 = 28 candies.
He gave 4/6 of what he had left to his brother when he went home, so 2/6 of all his candies left ot him. Hence,
[tex]28\ candies - \dfrac{2}{6}\\ \\x\ candies - \dfrac{4}{6}[/tex]
Write a proportion:
[tex]\dfrac{28}{x}=\dfrac{\frac{2}{6}}{\frac{4}{6}}\\ \\\dfrac{28}{x}=\dfrac{1}{2}\\ \\x=28\cdot 2=56[/tex]
Joe gave 56 candies to his brother, so Joe had 28 + 56 = 84 candies when he went home.
Joe gave 1/4 of his total candies to his classmates, so 3/4 of his candies left to him. So,
[tex]x\ candies - \dfrac{1}{4}\\ \\84\ candies - \dfrac{3}{4}[/tex]
Write a proportion:
[tex]\dfrac{x}{84}=\dfrac{\frac{1}{4}}{\frac{3}{4}}\\ \\\dfrac{x}{84}=\dfrac{1}{3}\\ \\3x=84\\ \\x=28[/tex]
Therefore, initially, Joe had 28 + 84 = 112 candies.
Match the vocabulary word with the correct definition.
1. circle
a chord of a circle that contains the center of the circle
2. diameter
a segment joining the center of a circle to a point of the circle
3. congruent circles
the set of all points in a plane that are at a given distance from a given point in the plane
4. concentric circles
circles that have equal radii
5. radius
two or more circles that lie in the same plane an have the same center
Answer:
1) the set of all points in a plane that are at a given distance from a given point in the plane
2)a chord of a circle that contains the center of the circle
3)circles that have equal radii
4)two or more circles that lie in the same plane an have the same center
5)a segment joining the center of a circle to a point of the circle
7(3+9) pls help me ASAP
Answer:
84
Step-by-step explanation:
Using PEMDAS: (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction)
7*(3+9)
7*(12)
84
Answer:
83
Step-by-step explanation:
the difference of n and 23 is greater than or equal to 33
23-n > 33
- <--- that's a greater than or equal to sign
Answer:
23-n > 33
Step-by-step explanation:
What is an equivalent expression to 4x - 16
Answer: x-4, 2x-8, 8x-32
Step-by-step explanation:
A concrete beam is used as a counterweight. The beam is 6 feet long with an 8-inch by 8-inch square base. If the beam has to be replaced by bags of sand, what is the volume (in ft^3) of the sand that will have the same weight as the beam?
Use the following densities for the materials involved (in pounds per cubic foot):
concrete 150
sand 100
4 cubic feet
Step-by-step explanation:
Step 1:
Length of the concrete beam = 6 feet
Side for the square base = 8 inch = 8/12 feet
So, volume of the concrete beam = 6*(8/12)*(8/12)= 2.67 cu ft
Hence mass of the beam = density of the beam * volume
= 150 * 2.67 = 400 kg
Step 2:
we need the the weight of sand equivalent to the concrete beam.
Mass of the sand bags = den of sand * vol
=> 100 * volume of sand = 400
=> Volume of sand = 400/100 = 4 cu feet.
10)
Simplify.
2(x + 3y - 3) - (2x + 6y - 7)
A) 0
B) 1
C) -3y + 4
D) -6x + 10
Answer:
B) 1
Step-by-step explanation:
Answer:1
Step-by-step explanation:
Wat does it mean to estimate a math problem
Answer: Estimate means a close guess.
For example, when estimating with decimals, we would round them to the nearest whole number to estimate the answer.
Example: 3.6 + 1.2
1.2 is closest to 1
3.6 is closes to 4
4 + 1 = 5
A good estimate is 5
3.6 + 1.2 = 4.8
4.8 is very close to 5, so 5 is a very good estimate.
Final answer:
Estimating a math problem involves making an educated approximation of a quantity using prior knowledge and reasoning. It applies to various fields and helps to rule out unrealistic numbers, as well as develop important problem-solving skills.
Explanation:
To estimate a math problem means to find a rough approximation or a ballpark figure of the quantity in question, rather than calculating the exact number. Estimations are based on sound reasoning, prior experience, and a strong grasp of the relevant variables and physical principles. The process is not a wild guess but a calculated approximation that can be derived from formulas where the input quantities are known to a limited precision.
For example, to estimate the mean rent for a two-bedroom apartment in a town, you might calculate the average of several listed rents. Or, in physics, to estimate how large a current will be in a circuit when it is turned on, you would apply the relevant principles and any known quantities to arrive at an approximate value. The goal of estimation is to get within a reasonable range of accuracy without needing a precise computation.
The skills of estimation are vital in many fields, including physics, and they help in ruling out unrealistic results. Practicing these skills, getting familiar with units, and understanding relationships between variables all contribute to making better estimates. Moreover, after arriving at an estimate, it's important to do a sanity check to make sure the result seems reasonable within the context of what is known.
what would be the amount of a check issued for an 08/11 invoice for 648.50 paid on 09/13 with the terms: 3/10, 2/15, N30-5%APR?
Answer:
The amount of a check issued for an 08/11 invoice, would depend on when the invoice is paid.
If it's paid within 13 days, there's a 3% discount . which will be calculated as
648.50 x 3% = $19.455 discount
If it's paid within 11 - 15 days, there's a 2% discount.
648.50 x 2% = $12.97 discount
If it's paid within 16 - 30 days, there is no discount
If it's paid after 30 days, 5% APR is added to the bill
The check would be for the invoice amount of $648.50 plus a late fee of $2.67, totaling $651.17. The late fee is applied since the payment was made 3 days after the 30-day period from the invoice date and calculated using a daily rate derived from the 5% APR.
Explanation:The invoice has specific payment terms: 3/10, 2/15, N30. These are discounts offered for early payment. The first part '3/10' means that the payer gets a 3% discount if they pay within 10 days. The second part '2/15' offers a 2% discount if the payer pays within 15 days. 'N30' means that the full amount due needs to be paid within 30 days from invoice date. Additionally, there is a 5% APR (annual percentage rate) charge for late payments.
The invoice was issued on 08/11, and the payment was made on 09/13, which is 33 days after the invoice date. Therefore, there aren't any discounts for the payment because it's not within the 10 or 15 days period. However, it's slightly over the 30 days, so there will be a late fee applied. The late fee is commonly calculated based on a daily rate. The daily rate is the APR divided by 365 (5%/365=0.0137%). Multiply the daily rate by the number of late days (33-30=3) and the invoice amount ($648.50).
So the late fee is 648.50*0.0137%*3=$2.67. The amount of the check would be the original invoice amount $648.50 plus late fee $2.67, so the total is $651.17.
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Calculate the distance
Benjamin rides
his scooter if he rides 3/5mile
each day
for 10 days.
Answer:
Step-by-step explanation:
30/5=6
Final answer:
Benjamin rides his scooter for a total of 6 miles over a period of 10 days, by multiplying the daily distance of 3/5 mile by 10 days.
Explanation:
To calculate the distance Benjamin rides his scooter over 10 days, we multiply the daily distance by the number of days. Benjamin rides 3/5 of a mile each day.
Distance per day = 3/5 mile
Number of days = 10 days
The total distance is:
3/5 mile/day × 10 days = 6 miles
Therefore, the correct answer is Benjamin will have traveled a total of 6 miles over the course of 10 days.
(05.01 MC)
The graph of the following system of equations is
2x + y = 6
6x + 3y = 18
Your answer:
O
overlapping lines
O
parallel lines
O
intersecting lines
Answer:
overlapping lines
Step-by-step explanation:
look at shown picture
Combine the like to simplify the expression: -5y + 12 + 8y − 6 − 2 =
First, let's move combine like terms:
-5y + 8y = 6 + 2 -12.
3y = -4.
y = -4/3
Answer:
x = -3 + 2y
Step-by-step explanation:
I'm not sure if that's correct, sorry, dear~!
Edward is part of a bird watching club and keeps track of the robins in a local park. To do so, he puts tags on 20 robins and releases them. Later, he catches 120 robins; 12 robins were tagged.
What is the best estimate for the robin's population?
Answer:
Total population = 200
Step-by-step explanation:
recaptured tagged/recaptured total ≈ tagged/total population
The best estimate for the total population of Robin's is 200.
What are Expressions?Expressions are mathematical statements which consist of two or more terms and terms are connected to each other using mathematical operators like addition, multiplication, subtraction and so on.
Given that,
Number of robins which are tagged = 20
Let x be the total population of robins.
Her catches some other robins.
Number of robins that he catched = 120
Number of robins he catched also is tagged = 12
We can write the expression as,
20 / x = 12 / 120
Cross multiplying, we get,
12x = 120 × 20
12x = 2400
x = 2400 / 12
x = 200
Hence the number of robins is 200.
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