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Nastasia [14]
3 years ago
12

Susanna can work 10 math problems in 15 minutes. How many can she work in an hour and a half?

Mathematics
2 answers:
shusha [124]3 years ago
7 0
Well this one is easy!
10 ~ 15
20 ~ 30
30 ~ 45
40 ~ 60
50 ~ 75
60 ~ 90
90 = 1 hour and 30 minutes! < 60 math problems.
docker41 [41]3 years ago
4 0
She can work 60 in an hour and a half. We find this by figuring out how many minutes are in an hour and a half (there are 90 minutes), dividing that number by 15 (which equals 6), and multiplying that number by 10 (which equals 60). 60 problems is the answer.
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Answer:

  (t, u, w) = (1, -2, -2)

Step-by-step explanation:

A graphing calculator makes short work of this, giving the solution as ...

  (t, u, w) = (1, -2, -2)

__

There are many ways to solve this "by hand." Here's one of them.

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Add this to twice the second equation. That sum is ...

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