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Shkiper50 [21]
3 years ago
9

For the past three months, Grace used her cell phone for 43 minutes, 62 minutes, and 57 minutes. How many minutes would she have

to use her cell phone this month for the average usage over the four months to be 55 minutes? Be sure to include units in your answer
Mathematics
1 answer:
Alika [10]3 years ago
6 0

Answer:

Step-by-step explanation:

If they want the average for four months to be 55 minutes, this means that the total of the four months = 55 x 4

Total of four months = 220 minutes

They already told us that the three previous months she used her cellphone for 43 minutes, 62 minutes and 57 minutes.

All you have to do now is subtract everything from the total of the four months.

4th month = 220 - 43 - 62 - 57

= ? Minutes

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Please help with this ASAP
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Answer:

7w^3/5v

Step-by-step explanation:

42v^3w^4/30v^4w

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2 years ago
Kyle works at a donut​ factory, where a​ 10-oz cup of coffee costs 95cents​, a​ 14-oz cup costs​ $1.15, and a​ 20-oz cup costs​
choli [55]
Let x = no. of 10 oz cups sold
Let y = no. of 14 oz cups sold
Let z = no. of 20 oz cups sold
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Equation 1: total number of cups sold:
x + y + z = 24
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Equation 2: amt of coffee consumed:
10x + 14y + 20z = 384
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Equation 3: total revenue from cups sold
.95x + 1.15y + 1.50z = 30.60
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Mult the 1st equation by 20 and subtract the 2nd equation from it:
20x + 20y + 20z = 480
10x + 14y + 20z = 384
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Mult the 1st equation by 1.5 and subtract the 3rd equation from it:
1.5x + 1.5y + 1.5z = 36.00
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---------------------------subtracting eliminates z again
.55x + .35y = 5.40; (eq 5)

Multiply eq 4 by .055 and subtract from eq 5:
.55x + .35y = 5.40
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y = .12/.02
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Substitute 6 for y for in eq 4
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x = 6 ea 10 oz cups

That would leave 12 ea 20 oz cups (24 - 6 - 6 = 12)

Check our solutions in eq 2:
10(6) + 14(6) + 20(12) =
60 + 84 + 240 = 384 oz

A lot steps, hope it made some sense! I hope this helps!! ;D

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Name a pair of whole number factors whose product is 8
hjlf
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