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kondor19780726 [428]
3 years ago
7

Kaitlin purchased a prepaid phone card for $15. Long distance calls cost 21 cents a minute using this card. Kaitlin used her car

d only once to make a long distance call. If the remaining credit on her card is $5.76, how many minutes did her call last?

Mathematics
1 answer:
Leya [2.2K]3 years ago
7 0
The phone call lasted for 44 minutes. If you leant you set up the equation properly, you will do great :)

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Work backward to find the value of the variable in the equation below d-4=23
AnnyKZ [126]

Answer:

27

Step-by-step explanation:

The equation is a onestep equation, so in order to find the variable, follow these steps:

d - 4 = 23

In order to isolate the variable or get the variable by itself, you need to get rid of the constants around it or the numbers without a variable. In order to do that for this equation, you'll need to do the inverse of subtracting 4, which would be adding four to both sides.

Adding 4 to positive 23 will give you the answer of 27;

d = 27

Therefore, the variable d equals 27

Hope this helps!

8 0
3 years ago
Which is the better buy?<br> 12 bars of soap for $10.00 or 5 bars of soap for $4.00
likoan [24]
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3 0
2 years ago
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Evaluate 7m + 3mn when m=8 and n=14
Murrr4er [49]

Answer:

392

Step-by-step explanation:

7(8) + 3(8)(14)

56 + 336

=392

*Brackets mean to multiply.

3 0
2 years ago
Find the equation for the line that passes through the point (−2,0), and that is perpendicular to the line with the equation 2/3
patriot [66]

Answer:

y = 3/2 x + 3

Step-by-step explanation:

2/3 x + y = -14/3

y = -2/3 x − 14/3

The slope of this line is -2/3.  So the perpendicular slope is the opposite of the inverse:

m = -1 / (-2/3)

m = 3/2

We know the slope of the line and a point on the line, so using point-slope form:

y − 0 = 3/2 (x − (-2))

Simplifying into slope-intercept form:

y = 3/2 (x + 2)

y = 3/2 x + 3

5 0
2 years ago
A box of colored crayons contains 11 distinct colors. In how many ways can 2 colors be chosen, assuming that the order of the co
Oduvanchick [21]

Answer:

55

Step-by-step explanation:

The first crayon is chosen out of 11,so there are 11 choices

11

The second crayon is chosen out of 10 crayons left so there are 10 choices

10

11*10 = 110

But we do not care about the order, so we divide by 2 since there are 2 places

110/2 =55

5 0
2 years ago
Read 2 more answers
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