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3 years ago

A college student completed some courses worth 3 credits and some

Mathematics

2 answers:

zzz [600]3 years ago

8 0

I think its A.

the answer is 12.9045.

which is close to 13.

I hope this helps.

-BARSIC- [3]3 years ago

4 0

Answer:

A. 13

Step-by-step explanation:

Note: It seems typo in the question. 5% should read 59.

Let 3 credit courses = x, 4 credit courses = y

As per given we have following equations:

x + y = 18
3x + 4y = 59

Solve the system by elimination. Multiply the first equation by 4 and subtract the second one:

4(x + y) - (3x + 4y) = 4(18) - 59
4x + 4y - 3x - 4y = 72 - 59
x = 13

The answer is 13

Correct choice is A

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