1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ICE Princess25 [194]
3 years ago
9

A man travels a distance of 20 miles at 60 miles per hour then returns over the same route at 40 miles per hour. Find the averag

e rate per hour.
A)50
B)48
C)47
D)46
Mathematics
1 answer:
elena55 [62]3 years ago
7 0
Average = (60 miles per hour + 40 miles per hour)/ 2 = 5<span>0 miles per hour
</span><span>average rate per hour = 50

answer
50</span>
You might be interested in
QUESTION 6 SOMEONE DO IT PLSS
vovangra [49]

Answer:

l think 7.71 is right answer

4 0
3 years ago
Read 2 more answers
Please help i put max points for u!!
jek_recluse [69]

Answer:

Equation: y = \frac{7}{4} x

21/2 cups of water

Step-by-step explanation:

Plug in 7 as y and 4 as x

7 = 4k

Find k

k = 7/4

Then plug k into th equation

y = 7/4 x

For the second part of the question:

Plug in x which is 6 into the bolded equation.

y = (7/4)(6) = 42/4 = 21/2 (simplified form)

21/2 cups of water

5 0
2 years ago
Read 2 more answers
-8-3x=-8(1-7x) how many solutions will mark barilest
Lina20 [59]

Answer:

x=0

Step-by-step explanation:

-8-3x=-8(1-7x)

add 8 to both sides =( -3x=56x)

subtract 56x from both sides (-59x=0)

divide both sides by -59 = (x=0)

5 0
2 years ago
A gardener wants to create a rectangular vegetable garden in a backyard. She wants it to have a total area of 120 square feet, a
erastova [34]
Comment
This is an area problem. The key words are 120 square feet and 12 feet longer.
And of course width is a key word when you are reading this.

Formula
Area = L * W

Givens
W = W
L = W + 12

Substitute and Solve
Area = L* W
120 = W*(W + 12)
W^2 + 12W = 120 square feet
w^2 + 12w - 120 = 0

This does not factor easily. I would have thought that a graph might help but not if the dimension has to be to the nearest 1/100 of a foot. The only thing we can do is use the quadratic formula.

a = 1
b = 12
c = - 120

w = [ -b +/- sqrt(b^2 - 4ac) ]/(2a)
w = [-12 +/- sqrt(12^2 - 4*(1)(-120)] / 2*1
w = [-12 +/- sqrt(144 - (-480)]/2
w = [-12 +/- sqrt(624)] / 2
w = [- 12 +/- 24.979992] / 2 The minus root has no meaning whatever.
w = (12.979992) / 2
w = 6.489995 I'll round all this when I get done

L = w + 12
L = 6.489995 + 12
L = 18.489995

check
Area = L * W
Area = 6.489995*18.489995
Area = 119.999935 The difference is a rounding error

Answer
L = 18.489995 = 18.49 feet
W = 6.489995 = 6.49 feet

Note: in the check if you round first to the answer, LW = 120.0001 when you find the area for the check. Kind of strange how that nearest 1/100th makes a difference.
5 0
3 years ago
1 Select the correct answer. Kalid simplified a polynomial expression as shown. (6x3 + 8x2 − 7x) − (2x2 + 3)(x − 8) step 1 (6x3
Eva8 [605]

Answer:

So, the step1 is correct.

Step-by-step explanation:

The expression is

(6 x^3 + 8 x^2 - 7 x)-(2x^2 + 3)(x- 8)\\\\(6 x^3 + 8 x^2 - 7 x) - (2x^3 - 16  x^2 + 3 x - 24)\\\\6 x^3 + 8 x^2 - 7 x - 2 x^3 - 16 x^2 + 3 x - 24\\\\4 x^3 - 8 x^2 - 4 x - 24

So, the step 1 is correct.

3 0
3 years ago
Other questions:
  • The perimeter of a triangle is 35 feet. One side of the triangle is five feet longer than the second side. The third side is thr
    9·1 answer
  • Can anyone help for brainst and a thanks?
    10·1 answer
  • Choose ALL terms like 5x?
    11·1 answer
  • Please help me please please help please in the picture please I need help
    5·1 answer
  • Solve the formula<br> h = 54t + at for a
    9·2 answers
  • Find the distance between -4,2 and -4,-5​
    6·1 answer
  • the fifth term of an arithmetic progression is 40 and the seventh term is 28 more than the 3rd term. Find the first and 10th ter
    12·1 answer
  • What is a human and what does it do
    14·2 answers
  • Two numbers are the ratio of 2:7. their sum is 63. what is the larger number?
    11·2 answers
  • 6(8f+10g) + 9g - 4(3g+9f)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!