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algol13
2 years ago
12

What is the result of multiplying the first equation by −3 and adding to the second equation?

Mathematics
1 answer:
Alla [95]2 years ago
4 0

Answer:

The answer is a _10×+8y=15

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Use expressions for odd integers to confirm the conjecture that the product for two odd integers is an odd integer.
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k, n - integers  

2k+1  - an odd integer

2n+1  - another odd integer

The product of them:

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= 2(2kn + k + n) + 1

The product of integers (2kn) is integer

and the sum of them (2kn+k+n) also is integer

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3 years ago
The length of the sides of a triangle are x, 2x+2, and 13. If the perimeter of the triangle is 30, what is the value of x?
scZoUnD [109]

Add all the sides up to equal 30 in an equation because you are given the perimeter. The perimeter is the length around a two dimensional shape. This means the perimeter is the length of all the side lengths added together.

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Combine like terms.

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