Answer: x = 4y/3+2
y = 0
Step-by-step explanation:
Peter hired a cleaning company to clean his house. The cleaning company charges a fixed fee of $15 plus $17 per hour to clean a house.
a) Write an equation that can be used to determine, c, the total amount in dollars that the cleaning company charges to clean a house in h hours.
b) The cleaning company charged a total of $83 to clean Peter's house. How many hours did it take to clean Peter's house?
c) A second cleaning company charges $20 per hour to clean a house. The second company does not
charge a fixed fee in addition to their hourly rate. For what number of hours is the total amount charged for cleaning a house the same for both companies? Show or explain how you got your answer.
(i need help with c.)
Answer:
5 (for c only)
Step-by-step explanation:
for c:
1st cleaning company: [tex]y=17x+15[/tex]
2nd cleaning company: [tex]y=20x[/tex]
set up as a system of equations. for them to cancle out make the y of one equation negative. I'll be making the second one negative ( it doesn't matter though)
it will look like:
[tex]y=17x+15[/tex]
[tex]-y=-20x[/tex]
make the two equations on top of eachother and line the terms up. Then combine them. The variable "y" will cancle out and you'll be left with
[tex]0=-3x+15[/tex]
then you will add 3x to both sides to get [tex]3x=15[/tex] then divide both sides by 3 to get [tex]x=5[/tex]
if you plug in 5 for x into both of the original equations you will see that they will both make $100 in five hours. So you answer is 5
Which length is longer 64 inches or 5 feet
The following frequency table summarizes the number of children that dads in Dads Club have.
Number of children Number of members
111 666
222 444
333 888
444 111
555 111
Based on this data, what is a reasonable estimate of the probability that the next dad to join Dads Club has fewer than 333 children?
Choose the best answer.
Choose 1 answer:
Choose 1 answer:
(Choice A)
A
20\%20%20, percent
(Choice B)
B
40\%40%40, percent
(Choice C)
C
50\%50%50, percent
(Choice D)
D
80\%80%80, percent
Answer:50%
Step-by-step explanation:
Answer:
50
Step-by-step explanation:
A cellphone company charges $60 for a cellphone and a monthly rate to use the phone.Regina will pay $1,140 for a 24-month cellphone plan.What is the monthly rate,m,for this cellphone plan?
The monthly rate is $45 for this cellphone plan.
Step-by-step explanation:
Given,
Amount charged for cell phone = $60
Amount paid by Regina for 24 month plan = $1140
Number of months = 24
Let,
m be the monthly rate for cellphone plan
Number of months * Monthly rate + cellphone charges = Amount paid
[tex]24m+60=1140\\24m=1140-60\\24m=1080[/tex]
Dividing both sides by 24
[tex]\frac{24m}{24}=\frac{1080}{24}\\m=45[/tex]
The monthly rate is $45 for this cellphone plan.
Keywords: subtraction, division
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If Talia’s old bedroom measured 1 feet by 10 feet how much larger or smaller will her new bedroom be ?
Expression: [tex]\((x - 3)(x + 5)\)[/tex]. If original is 10 × 10, new is 105 sq ft. New is 5 sq ft larger.
1. **Expression representing the two binomials for the area of Talia's new bedroom:**
Let [tex]\( x \)[/tex] represent the original length of the square bedroom.
The original bedroom's dimensions: [tex]\( x \times x \)[/tex]
The new bedroom's dimensions: [tex]\( (x - 3) \times (x + 5) \)[/tex]
So, the expression representing the two binomials would be: [tex]\((x - 3)(x + 5)\)[/tex]
2. **Finding the difference in size between old and new bedrooms:**
If the original bedroom measured 10 feet by 10 feet, then [tex]\( x = 10 \)[/tex] (since it's a square).
Substituting into the expression: [tex]\( (10 - 3)(10 + 5) = (7)(15) = 105 \)[/tex] square feet.
So, the new bedroom's area is 105 square feet.
The original bedroom's area is [tex]\( 10 \times 10 = 100 \)[/tex] square feet.
The difference is: [tex]\( 105 - 100 = 5 \)[/tex] square feet.
Therefore, her new bedroom will be 5 square feet larger than her old bedroom.
The complete question is here:
Talia has a square bedroom. Her family is moving and her bedroom in her new apartment will be 3 feet shorter in one direction and 5 feet longer in the other direction. Write an expression that represents the two binomials you would multiply together to find the area of Talia's new bedroom.
2nd Part
If Talia's old bedroom measured 10 feet by 10 feet, how much larger or smaller will her new bedroom be?
here u go these are the notes
You throw two darts at a dartboard.
Let event A = The first dart hits the center.
Let event B = The second dart hits the center
What does P(BA) represent?
O
A. The probability that either the first dart or the second dart hits the
center
O
B. The probability that the second dart hits the center given that the
first dart hits the center
C. The probability that the second dart doesn't hit the center
D. The probability that the first dart hits the center given that the
second dart hits the center
Answer:
B. The probability that the second dart hits the center given that the
first dart hits the center
Step-by-step explanation:
P(BA) is also called the "Conditional Probability" of B given A.
B. The probability that the second dart hits the center given that the first dart hits the center
The following information should be considered;
Here we assume event A be the first dart hits the center.And, event B be the second dart hits the center.Now P(BA) should represent that the second dart should hit the center.Also, P(BA) is known as the "Conditional Probability" of B given A.Learn more: https://brainly.com/question/6789603?referrer=searchResults
Polynomial functions with an even degree have y-axis symmetry
Polynomial functions with an even degree have y-axis symmetry is a true statement.
Explanation:
A function symmetrical with respect to the y-axis is called an even function. A function that is symmetrical with respect to the origin is called an odd function. f(x). Since f(−x) = f(x), this function is symmetrical with respect to the y-axis.
So a function that has an even degree in it, be it a polynomial function, has a y-axis symmetry always. The equations with odd degrees may or may not have a y axis symmetry.
The next model a sports car will cost 4.9% less than the current model the current model cost for the $2000 how much will the price decrease in dollars what will be the price of the next model
Answer:
$98.00
Step-by-step explanation:
$2000.00 x .049=$98.00
Marlie will be starting college next month. She was approved for a 10-year, Federal Unsubsidized student
loan in the amount of $18,800 at 4.29%. She knows she has the option of beginning repayment of the loan
in 4.5 years. She also knows that during this non-payment time, interest will accrue at 4.29%.
How much interest will Marlie accrue during the 4.5-year non-payment period?
Marlie's federal unsubsidized student loan will accrue $3,627.34 in interest over a 4.5-year non-payment period, given a 4.29% annual interest rate.
Explanation:The subject of this problem is calculating interest accrued on an unsubsidized student loan. First, we need to understand that the 4.29% interest is an annual rate. So, for 4.5 years, the rate would become: 4.29% * 4.5 = 19.305%.
To calculate the amount of interest that will accrue during this period, we simply multiply this by the principal loan amount ($18,800). So, $18,800 * 19.305% = $3,627.34. Therefore, Marlie will accrue $3,627.34 in interest over this 4.5-year period.
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Marlie, who took a Federal Unsubsidized student loan that accumulates interest over time, will accrue $3,628.83 in interest during her 4.5 years of non-payment.
Explanation:The subject of this question is about interest calculation on a Federal Unsubsidized student loan. Interest on an unsubsidized loan like Marlie's accumulates from the time the loan is disbursed until it's paid in full, including during the non-payment period. The interest that will accrue can be calculated using the formula I = PRT, where 'I' is the interest, 'P' is the principal amount (the initial amount of loan), 'R' is the annual interest rate in decimal, and 'T' is the time the money is borrowed for in years.
In Marlie's case, P = $18,800, R = 4.29/100 = 0.0429, and T = 4.5. Therefore, the interest accrued will be I = 18800 * 0.0429 * 4.5. After performing the calculation, the total interest that Marlie will accrue over the non-payment period is $3,628.83.
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What is the problem answer for 25% of 450
Answer:
112.5
Step-by-step explanation:
25/100 x450/1 =
11250/100=112.5
Write as a product of 2 binomials and a monomial (factor out as much as possible from each binomial):
(14x+21y)(6ab–3a)
[tex](14x+21y)(6ab-3a) = 3a(2b - 1)(14x + 21y)[/tex]
Solution:
Given that,
[tex](14x+21y)(6ab-3a)[/tex]
We have to factor out terms and write as a product of 2 binomials and monomial
A monomial is a mathematical expression with only one term, while a binomial is a mathematical expression with two terms.
From given expression,
[tex](14x+21y)(6ab-3a) = (14x + 21y)(3 \times 2ab -3a)[/tex]
3 and a are common factors in second bracket
[tex](14x+21y)(6ab-3a) = 3a(2b - 1)(14x + 21y)[/tex]
Hence, the product of two binomial is written in two binomial and a monomial
3/8 of the seventh grade students were taking advanced math at the beginning of the year, but seven dropped out by the end of the year. If there were 140 students taking advanced math at the end of the year, how many seventh grade students are there?
Answer:
392 students
Step-by-step explanation:
Given: 3/8 of the seventh grade students were taking advanced math at the beginning of the year.
Seven dropped out by the end of the year.
There are 140 students taking advanced math at the end of the year.
Lets assume total number of students of seventh grade be "x".
As given, 3/8 of the seventh grade students were taking advanced math at the beginning of the year.
∴ Number of student took advanced maths at the beginning= [tex]\frac{3}{8} \times x= \frac{3x}{8}[/tex]
We know, 7 student dropped out of advanced math by the end of the year.
Now, forming an equation to determine number of students taking advanced math at the end of the year.
⇒ [tex]\frac{3x}{8} -7= 140[/tex]
Solving the equation to find number of student in seventh grade.
⇒ [tex]\frac{3x}{8} -7= 140[/tex]
Adding both side by 7
⇒ [tex]\frac{3x}{8} = 140+7[/tex]
Multiplying both side by 8
⇒[tex]3x= 147\times 8[/tex]
Dividing both side by 3
⇒[tex]x= \frac{147\times 8}{3}[/tex]
∴ [tex]x= 392[/tex]
Hence, there are 392 students in seventh grade.
A cylinder has a radius of 14 m and a height of 6 m.
What is the exact volume of the cylinder?
841 m2
1687 m
5047 m
11767 m2
Volume of the cylinder is 3696 m²
Step-by-step explanation:
Step 1: Calculate volume of the cylinder using the formula V = πr²h⇒ V = 22/7 × 14² × 6 = 3696 m²
At a certain time of the day, a tree that is x meters tall casts a shadow that is x-49 meters long. If the distance from the top of the tree to the end of the shadow is x+1 meters, what is the height , x of the tree ?
The height of the tree is 60 meters.
Explanation:
Let the height of the tree be x. The tree casts a shadow of [tex]x-49[/tex] meters and the distance from the top of the tree to the end of the shadow is [tex]x+1[/tex] meters.
The sides of the triangle are attached in the image below:
Using pythagoras theorem,
[tex]x^{2}+(x-49)^{2}=(x+1)^{2}[/tex]
Expanding, we get,
[tex]2 x^{2}-98 x+2401=x^{2}+2 x+1[/tex]
[tex]2 x^{2}-98 x+2400=x^{2}+2 x[/tex]
[tex]2 x^{2}-100 x+2400=x^{2}[/tex]
[tex]x^{2}-100 x+2400=0[/tex]
Solving the equation using the quadratic formula [tex]x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}[/tex], we get,
[tex]x=\frac{-(-100)\pm\sqrt{(-100)^{2}-4 \cdot 1 \cdot 2400}}{2 \cdot 1}[/tex]
Simplifying, we have,
[tex]x=\frac{100\pm\sqrt{10000-9600}}{2}[/tex]
[tex]x=\frac{100\pm\sqrt{400}}{2}[/tex]
[tex]x=\frac{100\pm{20}}{2}[/tex]
Thus,
[tex]x=\frac{100+20}{2} \\x=\frac{120}{2} \\x=60[/tex] and [tex]x=\frac{100-20}{2} \\x=\frac{80}{2} \\x=40[/tex]
where the value [tex]x=40[/tex] is not possible because substituting the value [tex]x=40[/tex] in [tex]x-49[/tex] results in negative solution. Which is not possible.
Hence, the value of x is 60.
Thus, The height of the tree is 60 meters.
Decompose -6x/(x-6)(x+3)
into partial fractions.
Answer:
B
Step-by-step explanation:
Answer: B
Step-by-step explanation:
what type of triangle is this?
Are all squares proportional?
Answer:
Yes each side will always be of the same size unless you are purposely trying to make an uneven shape
Step-by-step explanation:
Which of the following is not a perfect square (a) 2025 (b) 3210 (c) 4900 (d) 7744
Answer:
the right answer is b
Step-by-step explanation:
since its square root does not result in an integer
Which graph represents the compound inequality?!
n<-2 or n 24
Answer:
isnt it n 24
Step-by-step explanation:
The human appendix has no known function
Which term applied to structures like this?
O adaxial
O homologous
O obligatory
O vestigial
Answer:
Vestigial.
Step-by-step explanation:
It might have had a use in the past and man's evolution has rendered it of no known use.
Mikhail saved $1 of his paycheck the first week. He saved $2 the second week. He saved $4 the third week. He saved $8 the fourth week. If this pattern continues, how much will he save the sixth week
Answer:32
Step-by-step explanation:
The pattern seems to double each time there is a new week. By the fourth week he saved $8, and it asks how much he saved by the sixth week. We know $8 x 2 = 16 and 16 x 2 = 32, SO, by the sixth week Mikhail saved $32!
Explain when you must write the number 1, and when you do not need to.
Answer:
Always write it except if distributing 1. This does NOT apply for -1!
Step-by-step explanation:
Substitution and to solve
Answer:
x=1 y=2, there are your answers. Have a good dayStep-by-step explanation:
y=−3x+5;5x−4y=−3
Step: Solve: y=−3x+5for y:
Step: Substitute: −3x+5foryin5x−4y=−3:
5x−4y=−3
5x−4(−3x+5)=−3
17x−20=−3 (you have to simplify both sides of the equation)
17x−20+20=−3+20(then add 20 to both sides)
17x=17
17x
17
=
17
17
(Divide both sides by 17)
x=1
Step: Substitute1forxiny=−3x+5:
y=−3x+5
y=(−3)(1)+5
y=2( again Simplify both sides of the equation)
The Answer Is:
x=1 and y=2
Am I incorrect?
Susy had 2/3 as much money as Mary at first. After receiving 1/2 of Mary's money, Susy had $210. How much money did Susy have at first?
Answer:
$120
Step-by-step explanation:
2/3 of Mary's money + 1/2 of Mary's money is equal to 7/6 of Mary's money
7/6 of Mary's money = $210
Mary's money = m
210 = 7/6*x
180 = x
Mary's money = $180
Suzy's original money = 2/3 of 180
2/3 * 180 = 120
There are 19 animals , total of legs are 54 and the animals are pigs and ducks. How many pigs and ducks are there?
Final answer:
Using a system of equations, we established that there are 8 pigs and 11 ducks among the 19 animals with a total of 54 legs.
Explanation:
To solve the problem of determining how many pigs and ducks there are when there are 19 animals in total and 54 legs, we set up two equations. Let's assume the number of pigs is x and the number of ducks is y. Pigs have 4 legs, and ducks have 2 legs. We can summarize this information in the following system of equations:
Equation 1: x + y = 19 (because there are 19 animals total)
Equation 2: 4x + 2y = 54 (because the total number of legs is 54)
We can solve this system using the substitution or elimination method. Simplifying Equation 2 by dividing every term by 2 gives us 2x + y = 27, which we'll call Equation 3.
Equation 3: 2x + y = 27
We can now subtract Equation 1 from Equation 3 to find the value of x:
(2x + y) - (x + y) = 27 - 19
(2x - x) + (y - y) = 8
x = 8 (number of pigs)
Substitute x back into Equation 1:
x + y = 19
8 + y = 19
y = 19 - 8
y = 11 (number of ducks)
Therefore, there are 8 pigs and 11 ducks among the 19 animals.
Estimate 19% of 44. 8, 9, 9.5, 10
The estimated value of 19% of 44 is 8 as per the percentage rule and rounding decimals rule.
The correct option is 8.
To estimate 19% of 44, we can start by finding 10% of 44, which is simply moving the decimal point one place to the left. So, 10% of 44 is 4.4.
Next, we can estimate 5% of 44 by dividing 10% by 2. This gives us 2.2.
Now, to estimate 19% of 44, we can add the estimates for 10% and 5%. So, 4.4 + 2.2 equals 6.6.
Given the options of 8, 9, 9.5, and 10, we can see that the estimate of 19% of 44 is closest to 9.
Therefore, the estimated value of 19% of 44 is 8.
It's important to note that this is an estimation, and the actual value of 19% of 44 is 8.36. The estimation technique used here is a quick approximation that can be useful in situations where an exact calculation is not required or when a rough estimate is sufficient.
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The complete question:
Estimate 19% of 44.
The available options are:
8, 9, 9.5, and 10.
Mia's workout routine is to swim for 100 minutes 3 times a week, jump rope for 1 minute 7 days a week, and run for 10
minutes 2 times a week. What is the total time that Mia's workout routine takes each week?
What is the value of p?
Answer:
c. 43*
Step-by-step explanation:
1) 180-133= 47
2) 80-90= 90
3) 90+47= 137
4) 180-137= 42*
if 150 microliters of a solution and serum contains 90 microliters of saline what is the dilution ratio of a solution
Final answer:
The dilution ratio of a solution when 150 microliters of it contains 90 microliters of saline is 3:5. This means there are 3 parts saline to every 5 parts of the total solution.
Explanation:
If 150 microliters of a solution contains 90 microliters of saline, the dilution ratio of the solution can be described as the volume of saline to the total volume of the solution. To find this ratio, divide the volume of saline by the total solution volume:
Ratio = Volume of Saline / Total Volume of Solution
Ratio = 90 µL / 150 µL
By dividing the two volumes, you get a ratio of 0.6, which can also be expressed as 3:5 after multiplying both numerator and denominator by 10 to eliminate the decimal. This means there are 3 parts of saline to every 5 parts of the total solution.
The dilution ratio is therefore 3:5.