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Gala2k [10]
3 years ago
12

Christine purchased a prepaid phone card for $20. Long distance calls cost 18 cents a minute using this card. Christine used her

card only once to make a long distance call. If the remaining credit on her card is $15.68, how many minutes did her call last?
Mathematics
1 answer:
Luda [366]3 years ago
6 0

Answer:

4 minutes and 32 seconds

Step-by-step explanation:

card $20.00-money left over $15.68            $20.00-$15.68  4.32

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What is the constant rate of change in the equation?<br> Y=5x+10
mezya [45]

Answer:

m =5

Step-by-step explanation:

================================================

The "<em>constant rate of change</em>" is also known as the slope (in straight line equations).

The equation is in <em>slope-intercept form</em>.

================================================

<em>Slope-Intercept Form is: </em>

<em></em>y = mx + b\\&#10;\rule{150}{0.5}\\&#10;\text{m - slope}\\&#10;\text{b - Y-Intercept}

================================================

<em>Since '5' takes up 'm's spot, it is the slope, or the constant rate of change. </em>

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<em>Hope this helps.</em>

6 0
2 years ago
Read 2 more answers
What is the answer for this question 7(x+4)-7=48-2x
Alex777 [14]

Answer:

x = 3

Step-by-step explanation:

7(x + 4) - 7 = 48 - 2x ← distribute parenthesis and simplify left side

7x + 28 - 7 = 48 - 2x

7x + 21 = 48 - 2x ( add 2x to both sides )

9x + 21 = 48 ( subtract 21 from both sides )

9x = 27 ( divide both sides by 9 )

x = 3

8 0
2 years ago
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What is the slope y=-5<br> what is the slope of y=2x-4<br> what is the slope of 3x-8y=17
const2013 [10]

Answer:

the slope for the first one is 0

the slope for the second one is 2

the slope for the third one is 3/8

Step-by-step explanation:

5 0
3 years ago
Help me please i will mark brainliest if correct
aksik [14]

Answer:

-11

8 = 2x + 30

8 - 30 = -22

-22 ÷ 2 = -11

x = -11

Also if you place 2×(-11) + 30 you get 8

8 0
2 years ago
Please help this is due tomorrow.<br><br> 1/2 of 20?
Mars2501 [29]

1/2 of 20 is 20/2 which is 10.

All you really need to do here is to divide 20 by 2 to get 10.


6 0
2 years ago
Read 2 more answers
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