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Alexandra [31]
2 years ago
12

DOES ANYONE KNOW HOW TO DO THIS???

Mathematics
1 answer:
Anna11 [10]2 years ago
4 0

Answer:

Cost of a pound of chocolate chips: $3.5

Cost of a pound of walnuts: $1.25

Step-by-step explanation:

x - cost of a pound of chocolate chips

y - cost of a pound of walnuts

We create two equations based on the information we have:

3x+2y=13

8x+4y=33

The whole point of these problems os to get rid of x or y. In this question, we can do this by multiplying both sides of the first equation by 2, and then subtracting it from the second equation:

8x+4y=33

6x+4y=26

2x=7

x=3.5

Then we change x for 3.5 in the first equation:

3×3.5+2y=13

10.5+2y=13

2y=2.5

y=1.25

Hope this helps!

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The answer to the equation from question 7 is 14.

Step-by-step explanation:

In question 7, we are given an equation.

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Next, solve the exponents for 2³ and 3².

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Add 8 to 9.

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Subtract 3 from 17.

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