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wariber [46]
2 years ago
10

Determine which relation is a function.

Mathematics
1 answer:
lutik1710 [3]2 years ago
3 0

Answer:

A

Step-by-step explanation:

One easy way to determine if a coordinate is a function or not is to look at the number in the x's place only. There should not be the same number on the x's side for a different pair.

Every pair has a different number on the x's side, which is why A is the only possible answer.

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Select the correct product.
AURORKA [14]

Answer:

Option A. 2x^{3}+7x^{2}+12x-8

Step-by-step explanation:

we have

(x^{2}+4x+8)(2x-1)

Applying the distributive property

(x^{2}+4x+8)(2x-1) =x^{2}(2x)-x^{2} +4x(2x)-4x+8(2x)-8\\ \\=2x^{3}-x^{2} +8x^{2}-4x+16x-8\\ \\= 2x^{3}+7x^{2}+12x-8

7 0
3 years ago
"the sum of the digits of a two-digit number is 13. reversing the digits produces a number that is 9 less than the original numb
Ksenya-84 [330]
Suppose the one's digit is x, the ten's digit is y. the original number is 10y+x, the reversed number is 10x+y

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(10x+y)=(10y+x)-9 =>9y-9x=9 =>y-x=1
Add the two equation to solve: 2y=14 =>y=7
x=13-7=6
the original number is 76. 


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