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3 years ago

Need a little help with this problem

Mathematics

1 answer:

BaLLatris [955]3 years ago

6 0

Answer:

Step-by-step explanation:

Rate (slope) of miles per gallon of gas: m = $\frac{y_{2} -y_{1} }{x_{2} -x_{1} }$

(0, 0)

(2, 50)

$m_{carA}$ = 25 mi/gal.

(0, 0)

(3, 60)

$m_{carB}$ = 20 mi/gal.

Car B use less gasoline.

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PLEASE HELP, I DONT UNDERSTAND THIS.....Michael is laying carpet in a perfectly rectangular hall. The area of the hall is 240 sq

Setler79 [48]

Answer:

40 feet

Step-by-step explanation:

We know that the area of a rectangle is represented as $lw=a$ , where l is the length and w is the width.

We already know the width, and we know the area, so we can plug these values into the equation.

$l\cdot 6 = 240$

Our goal is to now isolate the variable l, and to do this we can divide both sides by 6.

$(l\cdot6) \div6 = 240\div6\\\\l = 40$

Hope this helped!

8 0

3 years ago

Read 2 more answers

Mrs. Spring left half of her estate to her son Sam. She left half of the remaining half to her cousin Fred. She left half of the

FinnZ [79.3K]

The total amount of Mrs. Spring's estate is $200,000

<h3>What is a fraction?</h3>

A fraction is written in the form of a numerator and a denominator where the denominator is greater than the numerator.

Example: 1/2, 1/3 is a fraction.

We have,

Let the total estate = 100x

Share left with Sam = 50x

Remaining share = 50x

Now,

Share left with cousin Fred = 1/2 of 50x = 25x

Remaining share = 25x

Share left with nephew Bill = 1/2 x (25x) = 12.5x

Remaining share = 12.5x

Share left with the care of the cat Chester = 12.5x

12.5x = $25,000

Now,

12.5x = $25,000

Multiply with 100/12.5 on both sides.

100/12.5 x 12.5x = 100/12.5 x $25,000

100x = $200,000

Thus,

The total amount of Mrs. Spring's estate is $200,000

Learn more about fractions here:

brainly.com/question/24370499

#SPJ1

5 0

1 year ago

Contestants in a dance a thon rest for the same amount of time evry hour.A couple rest for 25 mins in 5 hours. How long did they

Shalnov [3]

Same amount of time every hour is constant rate.
25 min / 5 hrs = 5 min per hour

8 hrs × 5 min per hr = 40 min rest

3 0

3 years ago

The temperature changed from 7°F at 6 p.M to -5°F at midnight. What was the difference between the high and low temperatures? Wh

IgorC [24]

Answer:

12 °F

2°F per hour

Step-by-step explanation:

The difference can be found by substracting:

7°F-( -5 °F)

=12 °F

To find the average change in temperature per hour, divide by how many hours between 6 to midnight. Between 6 to midnight is 6 hours.

12°F / 6 hours

= 2°F/ hour

7 0

3 years ago

Solve the quadratic equations

Alexxx [7]

Answer:

for quadratic equation 1

y^2-10y+21=0

Step-by-step explanation:

y^2-7y-3y+21=0

y(y-7)-3(y-7)=0

(y-7)(y-3)=0

y-7=0,y-3=0

y=7,y=3

y=(3,7)

for quadratic equation 2

16p^2-8p+1=0

16p^2-4p-4p+1=0

4p(4p-1)-1(4p-1)=0

(4p-1)twice=0

4p-1=0,4p-1=0

4p=1

p=1/4 twice

for quadratic equation 3

x^2-400=0

x^2=400

x=√400

x=20

for quadratic equation 4

-16m^2-8m-1=0

multiply the equation by -

16m^2+8m+1=0

16m^2+4m+4m+1=0

4m(4m+1)1(4m+1)=0

4m+1=0 twice

m=-1/4 twice

for quadratic equation 5

-3n^2+75=0

divide both side by -3

-3n^2/-3=-75/-3

n^2=25

n=√25

n=5

6 0

3 years ago