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Furkat [3]
2 years ago
8

Please solve thank you ​

Mathematics
1 answer:
mixas84 [53]2 years ago
8 0
You have to find the radius r, which is half of the diameter. So r is 3. Then plug in r and you get 12 cubic inches
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Number of weekend minutes used: x
Number of weekday minutes used: y

This month Nick was billed for 643 minutes:
(1) x+y=643

The charge for these minutes was $35.44
Telephone company charges $0.04 per minute for weekend calls (x)
and $0.08 per minute for calls made on weekdays (y)
(2) 0.04x+0.08y=35.44

We have a system of 2 equations and 2 unkowns:
(1) x+y=643
(2) 0.04x+0.08y=35.44

Using the method of substitution
Isolating x from the first equation:
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(3) x=643-y

Replacing x by 643-y in the second equation
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0.04(643-y)+0.08y=35.44
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0.04y+25.72=35.44

Solving for y:
0.04y+25.72-25.72=35.44-25.72
0.04y=9.72

Dividing both sides of the equation by 0.04:
0.04y/0.04=9.72/0.04
y=243

Replacing y by 243 in the equation (3)
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x=643-243
x=400


Answers:
The number of weekends minutes used was 400
The number of weekdays minutes used was 243
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3 years ago
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