Mathematics College

PLEASE ANSWER 20 POINTS
The following steps show how the equation for the average rate can be transformed so that it is written in terms of only the rates for each leg of the trip. Write an algebraic justification for each step. Think about the number operations and properties that you know.

PLEASE ANSWER 20 POINTSThe Following Steps Show How The Equation For The Average Rate Can Be Transformed
PLEASE ANSWER 20 POINTSThe Following Steps Show How The Equation For The Average Rate Can Be Transformed

Answers

Answer 1

Answer:

Step-by-step explanation:

Step 1:

Sum of fractions in the denominator making cross product:

d / r1 + d / r2

Resulting:

d * r2 + d * r1 / (r1 * r2)

Step 2:

Multiply numerator and denominator by the following expression:

(r1 * r2) / (d * r2 + d * r1)

Step 3:

Take common factor in the denominator of the expression in step 2.

Resulting:

(d * r2 + d * r1) = d * (r2 + r1)

Related Questions

Solve the following system of equations: (2 points) −2x + y = 1 −4x + y = −1

Answers

Answer:

(x,y)=(1/2,0)

Step-by-step explanation:

rewrite the expression

-2x+y=-1

1-4x+y=-1

HELP URGENT PLEASSSSSSSSSSSSSSEEEEEEEEEEEEEEEE

Answers

Answer:

1 4/5 pounds each

Step-by-step explanation:

9/5 = 1 4/5

A plane is traveling at a constant rate described by d = 525t where d is the distance and t is the time. What is the constant of proportionality?

Answers

Answer:

50 points

Step-by-step explanation:

Answer:

525 is the constant of proportionality

Step-by-step explanation:

An earlier study determined that 60% of women older than age 50 have annual mammograms. To see if this proportion is still valid, we send surveys to 1000 women older than age 50. Of the 100 who respond, 70 say they have annual mammograms. What is the (estimated) current proportion of women older than age 50 who say they get annual mammograms

Answers

Answer:

The % of women above 50 having mammograms as devised from the survey is 70%.

Step-by-step explanation:

Given

60% of women older than age 50 have annual mammograms

Out of 1000 surveyed women of  age greater than 50, 100 women responded and out of these 100, 70 confirmed that they have annual mammograms

The % of women above 50 having mammograms as devised from the survey is 70%.

4. What is the formula for distance?
d= r/t
d = rt
d = r-t
d=r+t

ILL MARKBRAINLYST PLS

Answers

Answer:

b) d=rt

Step-by-step explanation:

Enter the phrase as an algebraic expression.

the product of 38 and g

Answers

Answer:

38g

Step-by-step explanation:

Product means multiplication so:

The product of 38 and g is 38g


I WILL GIVR U BRAINERLEST AND A LIKE

The windows in an office building are
shaped like parallelograms. The base of
each window is 1.8 meters and the
height is 1.5 meters. What is the area
of each window?


Answers

Answer:2.7

Step-by-step explanation:

Just multily the 2 products

What is the probability that a randomly selected date in the year 2021 is not in the month of October or
November?
Type your answer into the box as a decimal. Round to the nearest thousandth.

Answers

Answer:

0.833

Step-by-step explanation:

There are 365 days in 2021

There are 31 days in October

There are 30 days in November

(365-61)/365 = 0.833

which of the following could be the graph of the line y=3x-2?

Answers

Answer:

D should be the right answer

Answer:

C. IS THE CORRECT ANSWER

Step-by-step explanation:

I APRECIATE HELP. A regression line was calculated for three similar data sets (A, B, and C) that measure the height of a plant (in inches) over time (in days). The residual plots for each set are shown. Based on the residuals, which data set is best fit by the regression line?

Answers

The data set that is best fitted by the regression line is; Data Set B

What are regression residuals?

Residuals are described as the distance of  each point from the regression line.  Thus, the farther each point is from the line, the worse the fit and the closer each point is to the line, the better the fit.

Graph C has points that are not tightly centered around a line.  This is not a good fit.

Graph A has a straight line; it is not a good fit.

Graph B, shows us that all of the points are tightly centered around a line; this is a good fit.

Read more about Regression Residuals at; https://brainly.com/question/17844286

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help please, asap. i need this done

Answers

Answer:

2

Step-by-step explanation:

15/3=5

25/5 = 5

10/2 = 5

Answer:

2

Step-by-step explanation:

You have to find the "pattern."

for 15 and 3, you have to divide 15 by 5 and thats 3.

for 25 and 5, 25/5 is 5, so 10/5 is 2.

help please. i need it asap

Answers

Answer:

The answer  3

Step-by-step explanation:

Megan saves $42 every 6 days. How much does she save in 1 day?

Answers

Answer:

7

Step-by-step explanation:

6x7=42

Step-by-step explanation:

$42 divided by 6 = 7 so Megan makes $7 each day.

Charles is eight years older than five times Mark's age. If Charles is 63 years old, how old is Mark?

Answers

Answer:

21

Step-by-step explanation:

Answer: 11

Step-by-step explanation:

11x 5 is 55. 55 plus 8 is 63

Find the surface area of the prism

Answers

Answer:

192 km²

Step-by-step explanation:

Surface Area of the triangular prism = 2(Base Area) + Perimeter of Base*height of the prism

✔️Base Area = ½*bh

b = 6 km

h = 8 km

Base area = ½*6*8 = 24 km²

✔️Perimeter of base = 6 + 8 + 10 = 24 km

✔️Height of prism = 6 km

Plug in the values into the equation:

Surface area = 2(24) + 24*6 = 48 + 144

Surface area = 192 km²

A sports store received a shipment of 150 footballs and basketballs. 20% were basketballs. How many footballs were in the shipment?

Answers

Answer:

10 is the answer

Step-by-step explanation:

Answer:

120

Step-by-step explanation:

120 because 20% of the 150 balls is 30 or right so forth the football is a subtract the 150 from the 30 which gives you 120

Which equation below is decreasing across all real numbers ?

A. y=2(1/4)^x

B. y=1/3(5)^x

C. y=3x-5

D. y=3(5)^x

Answers

Answer:

A

Step-by-step explanation:

All the other exponential equations have a base greater than 1 except A and c is a linear equation with positive slope

write and equation for the trend line shown

Answers

segegeuryryyututtetutuuipyuyibysttuututuututututueuttutupexjuyjjplanatio

Find the volume of a cylinder with a radius of 3 meters and a height of 13 meters. Use 3.14 The volume of the cylinder is Type a whole number or decimal rounded to the nearest hundredth as needed.)​

Answers

Question:-

Find the volume of a cylinder with a radius of 3 meters and a height of 13 meters.

Answer:-

Given:-

[tex] \bullet [/tex] Radius (r) of a cylinder = 3 meters.

[tex] \bullet [/tex] Height (h) of a cylinder = 13 meters.

To Find:-

The volume of a cylinder.

Solution:-

We know,

Formula of Volume of a cylinder is πr²h.

So, Volume of a cylinder = 3.14 × (3)² × 13

Volume of a cylinder = 3.14 × 3 × 3 × 13

Volume of a cylinder = 367.38 cubic meters.

The volume of a cylinder is 367.38 cubic meters. [Answer]

WILL MARK BRAINLYIST

Answers

You are already correct.

Greg buys 21 bags of nails. Each bag has 85 nails in it. Greg rounds both numbers to the nearest ten to find an estimate of the total number of nails. What is the difference between Greg's estimate of the total number of nails and the actual total number of nails?

Answers

Answer:

1800

Step-by-step explanation:

21 rounds to 20

85 rounds to 90

20*90=1800

21*85=1785

1800-1785=15 nail difference

Find all missing side lengths

Answers

Answer:

Sin 60=y/46

y=39.8

-39.8^2+46^2=x^2

X=23

So y=39.8 and x=23

What is the answer ?

Answers

The answer is b welcome

Which angles are adjacent to each other?

Answers

Answer:

1st option maybe?

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

Adjacent angles are two angles that have a common vertex and a common side but do not overlap.They share the same vertex and the same common side.

A survey of Mrs. Ramirez's students showed that 30
students will have pizza fonlunch, 17 will have macaroni
and cheese, 12 will have a hamburger, and 5 will have
chicken fingers. Suppose Mrs. Ramirez surveys all 1 200
students in the school. How many students can she
expect to choose hamburgers for
Hunch?

Answers

Answer: 480

Step-by-step explanation:

We can create a ratio for this!

We have:

[tex]\frac{number of hamburgers}{total students}[/tex]= [tex]\frac{new number of hamburgers}{new number of students}[/tex]

We can use substitution to input the information we already know:

[tex]\frac{12}{30}[/tex] = [tex]\frac{x}{1200}[/tex]

Using cross multiplication, we get:

1 200(12) = 30x

14,400 = 30x

[tex]\frac{14,400}{30}[/tex]=[tex]\frac{30x}{30}[/tex]

x = 480

Hope this helps! :)

The number of students expect to have hamburgers for lunch is 225 students.

What is a word problem?

A word problem is a verbal description of a problem situation. It consists of few sentences describing a 'real-life' scenario where a problem needs to be solved by way of a mathematical calculation.

For the given situation,

Mrs. Ramirez's survey on students

Number of students have pizza = 30

Number of students have macaroni and cheese = 17

Number of students have a hamburger = 12

Number of students have chicken fingers = 5

Total number of students = 64.

Now, Mrs. Ramirez surveys all 1 200 students.

Then number of students expect to choose hamburgers for lunch can be found by,

[tex]\frac{Number of students have hamburgers}{Total number of students} = \frac{Number of students expect to have hamburgers}{ Total number of students}[/tex]

Let x be the number of students expect to have hamburgers.

⇒ [tex]\frac{12}{64}=\frac{x}{1200}[/tex]

⇒ [tex]x=\frac{(12)(1200)}{64}[/tex]

⇒ [tex]x=225[/tex]

Hence we can conclude that the number of students expect to have hamburgers for lunch is 225 students.

Learn more about word problems here

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Test due in 2 hours! Will give good review and brainliest. :)

Answers

V=69.17m3
Use Conects

Answer:

circumference =9 volume = 972

Step-by-step explanation:

circumference of sphere =2 π r =18π ; r= 18π/2 π =9

Volume =4/3 *π r^3 =π* 4/3 *9*81 =4*3*81 π =12*81π = 972π Cubic inches

Volume of sphere is=972π

may i be marked brainliest?

Can someone help me pls

Which one of the following statements is true?

A. The input value is the dependent variable.

B. The input value is the independent variable.

C. The output value is the independent variable.

D. The output value can be the dependent variable or the independent variable, depending on the situation.

No links pls. Thank you for understanding (:

Answers

The input value is the independent variable. Then the correct option is B.

What is decision-making?

Determining the proper option, acquiring evidence, and exploring various options are all steps in the decision-making process.

Let the function be y = f(x).

Then the variable x is independent but the variable y is depending on the on x.

The input value is the independent variable.

Then the correct option is B.

More about the decision-making link is given below.

https://brainly.com/question/3369578

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The radius of a circle is 7 in find its area to the nearest tenth

Answers

Answer:

why there is no problem i do not see it

Step-by-step explanation:

Determine what type of solution the following equation has: 2x-7=2x+3

- No solution
- One solution
-Infinitely Many solution

Answers

I’m pretty sure that has no solution! :)

Explanation:
2x - 7 = 2x + 3
2x - 2x -7 = 2x - 2x + 3
-7 = 3
no solution

(Also, could I get brainliest?)

1. What is the volume of the triangular prism below? h = 6.7 m 2 VBA 12.4 m 8 m​

Answers

Answer:Remember the formula for calculating volume is: Volume = Area by height. V = A X h.

For a triangle the area is calculated using the formula: Area = half of base by altitude. A = 0.5 X b X a.

So to calculate the volume of a triangular prism, the formula is: V = 0.5 X b X a X h.

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