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svetlana [45]
2 years ago
11

Needing help with some of my college summer HW

Mathematics
1 answer:
Arte-miy333 [17]2 years ago
5 0

B. Half the speed of the car. and C. The number of different colors on the page.


Variables are symbols for unknown values, so you have to find the statements that contain an unknown value.


A. 27 ⇒ The point value is known, so there is no variable.

B. \frac{1}{2}X ⇒ Since the speed of the car is unknown, the variable X represents the speed of the car. This variable is multiplied by \frac{1}{2} or divided by 2 to get half the speed of the car.

C. X ⇒ The number of different colors is not known, so the variable X represents the number of different colors.

D. 80 ⇒ There is nothing unknown in the statement.


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15 percent of 9 dollars is $?
Nataly_w [17]

Answer:

pretty sure it's 1.35

Step-by-step explanation:

have a wonderful day my friend

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3 years ago
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Hi, I need help.
slavikrds [6]

Answer:

B, 24 (second answer choice)

Step-by-step explanation:

4r+7s=23

r-2s=17

8r+14s=46

7r-14s=119

15r=165

r=11

11-2s=17..........by putting value of r in ii

-2s=17-11

2s= -6

s= -3

3r+3s=3*11+3(-3) you get this by putting values of r and s

       =33-9

       =24    (B)

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2 years ago
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Traveling at an average speed of 50 miles per hour, the trip from point A to point B takes 2 hours. Traveling at an
Anarel [89]

Answer:

option A is the correct answer.

Step-by-step explanation:

4 0
3 years ago
Which of the following pairs of functions are inverses of each other?
AnnyKZ [126]

Answer:

Step-by-step explanation:

Rearrange each function to solve for x.

Switch x and y,

The resulting equation is the inverse function.

A:

f(x) = y = 5+x

x = y-5

y = x-5

f⁻¹(x) = x-5

g(x) = 5-x ≠ f⁻¹(x)

g(x) is not the inverse of f(x).

:::::

B:

f(x) = y = 2x-9

x = (y+9)/2

y = (x+9)/2

f⁻¹(x) = (x+9)/2

g(x) = (x+9)/2 = f⁻¹(x)

g(x) is the inverse of f(x).

:::::

C:

f(x) = y = 2/x - 6

x = 2/(y+6)

y = 2/(x+6)

f⁻¹(x) = 2/(x+6)

g(x) = (x+6)/2 ≠ f⁻¹(x)

:::::

D:

f(x) = y = x/3 + 4

x = 3y - 12

y = 3x - 12

f⁻¹(x) = 3x - 12

g(x) = 3x - 4 ≠ f⁻¹(x)

g(x) is not the inverse of f(x).

4 0
2 years ago
The factory makes light bulbs the probability that a bulb is defective is 1/15 if 300 light bulbs are tested about how many are
irga5000 [103]
defective : working = 1/15 ( x20 ) 20/300
so the answer is 20 light bulbs
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