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seropon [69]
3 years ago
11

Karen purchased a prepaid phone card for $15. Long distance calls cost 11 cents a minute using this card. Karen used her card on

ly once to make a long distance call. If the remaining credit on her card is $13.68, how many minutes did her call last?
I need help on this!
Mathematics
1 answer:
Fiesta28 [93]3 years ago
4 0

Answer:

12 minutes

Step-by-step explanation:

You subtract 13.68 from 15 which gives you 1.32 which you then divide by .11 since it was eleven cents per minute on the phone and you end up getting 12.

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Graph the line with the equation y = -x - 3.
larisa [96]

Answer:

Step-by-step explanation:

y=-x-3

This means a graph with a slope of -1, and a y-intercept of -3

8 0
2 years ago
Find the area of the figures.
levacccp [35]

Answer:

First one: 114

Second one: 64

Step-by-step explanation:

For the first one, you can break apart the shapes to a square and a rectangle

The square is 7 x 7 (12 - 5 = 7)

The rectangle is 13 x 5

The square is 49

The rectangle is 65

Add them together

The first one is 114

For the second one you can break it apart to a triangle and a rectangle

The rectangle is 4 x 12

The triangle is 0.5 * 8 * 4   [8 is 12 - 4 (base)]

The rectangle is 48

The triangle is 16

Add them together

48 + 16 = 64

The second one is 64

6 0
3 years ago
For the following function y = f(x) = 4x^3 - 5
goblinko [34]

The answer for each of the differentiation are; f'(-6) = 432;  f⁻¹(y) = ∛((y + 5)/4); df⁻¹/dy = 1/432

<h3>How to differentiate functions?</h3>

1) f(x) = 4x³ - 5

We will differentiate it to get;

f'(x) = df/dx = 12x²

f'(-6) = 12(-6)²

f'(-6) = 432

2) We are given the formula;

x = f⁻¹(y)

Thus;

y = 4x³ - 5

4x³ = y + 5

x³ = (y + 5)/4

x = ∛((y + 5)/4)

f⁻¹(y) = ∛((y + 5)/4)

c)  f⁻¹(y) = ∛((y + 5)/4)

df⁻¹/dy = -1/12y²

At f(-6), we have;

df⁻¹/dy = 1/432

Read more about Differentiation at; brainly.com/question/5313449

#SPJ1

6 0
2 years ago
Two minutes after a diver enters the water,he descended 52 feet. After 5 minutes, he ascends 130 feet. At what rate is the scuba
Mrac [35]
I believe he is descending at 26 ft per a minute.
3 0
3 years ago
Read 2 more answers
What is the solution to this system? 2x+3y=12 -4x+5y=-2
Elden [556K]

answer: (3,2)

step by step explanation: :)

7 0
3 years ago
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