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polet [3.4K]
3 years ago
8

Evaluate the following expression using the values given: Find -a^2-3b^3+c^2+2b^3-c^2 if a=3, b=2, and c=-3.

Mathematics
1 answer:
erastovalidia [21]3 years ago
7 0
Ok so substitute the values. a=3 b=2 and c=-3
-3^(2)-3(2)^(3)+(-3)^(2)+2(2)^(3)-(-3)^(2)=-9-24+9+16-9=-33+25-9=-42+25=-17
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Mari works part time selling both hats and scarfs. One week she earns $114.00 by selling eight hats and 10 scarves. The followin
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Using a system of equations, it is found that she earns $5.5 for each hat and $7 for each scarf sold.

<h3>What is a system of equations?</h3>

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

In this problem, the variables are:

  • Variable x: Cost of a hat.
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One week she earns $114.00 by selling eight hats and 10 scarves, hence:

8x + 10y = 114.

The following week she sold 12 hats and six scarves and earned $108.00, hence:

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Simplifying by 6:

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12x = 66

x = 66/12

x = 5.5

y = 18 - 2x = 18 - 2 x 5.5 = 7.

More can be learned about a system of equations at brainly.com/question/24342899

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