Much HELP needed here!! If you can id appreciate it so much ):

Answer:

10 hours

Step-by-step explanation:

Let [tex]N[/tex] represent the distance the train heading north has traveled

Let [tex]S\\[/tex] represent the distance the train heading south has traveled

Let [tex]t[/tex] represent the number of hours that has passed

[tex]N=25t\\S=35t[/tex]

[tex]600=N+S[/tex]

[tex]600=25t+35t\\600=60t\\t=10[/tex]

Answer: 1/5

Step-by-step explanation: To find the probability of selecting a mint out of the jar, we use our ratio for the probability of an event which is shown below.

(P) event = number of favorable outcomes/total number of outcomes.

Since there are 7 mints in the jar, the number of favorable outcomes is 4 and since there are 35 candies in all,

the total number of outcomes is 35.

Therefore, the probability of selecting a mint is 7/35.

Notice however that 7/35 is not in lowest terms so we need to divide the numerator and denominator of 7/35 by their greatest common factor of 7 to get 1/5.

So our final answer for the probability of selecting a mint is 1/5.

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 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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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

23-n > 33

- <--- that's a greater than or equal to sign

Answer:

23-n > 33

Step-by-step explanation:

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.

The rate of the cabin cruiser in calm water is 9 mph and the rate of the current 3 mph

Step-by-step explanation:

Given:

Speed of cabin cruiser travelling with then current =  12 mi in 1 h.

Against the current, it took 2 h to travel the same distance.

To Find:

The rate of the boat in calm water and the rate of the current = ?

Solution:

Let  boat speed in calm water  be s

Let rate of the current  be c

Then

(s-c) = effective speed upstream

and

(s+c) = effective speed downstream

Writing a distance equation for each trip:

distance  = [tex]time \times \text{effective speed}[/tex]

1(s + c) = 12

2(s - c) = 12

On the first equation divide both sides by 1

On the second equation divide both sides by 2

s + c = 12

s - c = 6

Now addition of the above two equations gives

2s = 18

s = 9 mph, boat speed in calm water

Lets substitute s value to find  c value

s + c = 12

9 + c = 12

c = 12 - 9

c = 3 mph is the current

Final answer:

The cabin cruiser's rate in calm water is 9 mph, and the rate of the current is 3 mph.

Explanation:

To solve this problem, we will let c represent the rate of the current and r represent the rate of the cabin cruiser in calm water. When traveling with the current, the effective speed of the cruiser is r + c, and against the current, it is r - c.

Using the given information:

Now we can set up a system of equations:

Adding these two equations, we get:

2r = 18

Dividing both sides by 2, we find r = 9 mph. Thus, the rate of the cabin cruiser in calm water is 9 mph. To find the rate of the current, plug r = 9 into either of the original equations. Let's use equation (2):

9 - c = 6

Subtracting 9 from both sides, we find c = 3 mph. So the rate of the current is 3 mph.

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

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

Answer:

-6

Step-by-step explanation:

the first part is equal to -8 and then you add two which is -6

Answer:

He bikes 1.6 km per hour.

Step-by-step explanation:

If he bikes 3.2km un 2 hours, then:

3.2 km / 2 hours = 1.6 km / hour

Answer:

overlapping lines

Step-by-step explanation:

look at shown picture

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.

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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Answer:   x-4, 2x-8, 8x-32

Step-by-step explanation:

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.

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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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.

Answer:

Step-by-step explanation:

8y-24=8(y-3)

Answer:

21.6

Step-by-step explanation:

18 is the 100% of the given number, 120% is 18 + 20% of 18

to find 20% of 18 we multiply 18 by 20 and the divide it by 100

18 × 20 ÷ 100 = 3.6 now add this to 18 and the answer is 21.6

Answer:

21,6

Step-by-step explanation:

120% × 18 =

= 120×18/100

= 2160/100

= 21,6

Answer:

Net Change in Geno's Field Position = 22 yards

Step-by-step explanation:

Assuming Geno initial position before change is 0

Geno Gained 4 yards three times = 4*3 = 12yards

Geno lose 1 yard twice = 1*(-2) = -2yards

Geno Gained 6 yards twice = 6*2 = 12yards

Net Change in Geno's Field Position = 12 + (-2) + 12 yards

                                                            = 22 yards

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

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

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

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

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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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.

Answer:

20

Step-by-step explanation:

Average =

sum of scores/number of score

= 14 + 17 + 22 + 27 / 4

= 80/4

= 20

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

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:

Step-by-step explanation:

Formula of straight line is given as:

[tex]y= mx + c[/tex]

Where m = is the gradient or slope & c = y-intercept.

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