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Vlad1618 [11]
3 years ago
14

I don't understand plz help! Evaluate each expression for g = -7 and h = 3 and match it to its value.

Mathematics
1 answer:
boyakko [2]3 years ago
5 0

Answer:

Answers: 1) gh= -7×3= -21

2) g2-h= -7×2-3= -17 *that is what I got from my calculations.

3) g+ h2 = -7+3×2= 1 *that is what I got from my calculations.

4) g+h = -7+3 = -4

5) h-g= 3--7= 3+7= 10

6) g-h= -7-3= 10

Step-by-step explanation:

I don't fully understand neither but I tried.

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Which statement is true? A. 2x – 1 = 13 and x = 6 B. 2x – 1 = 13 and x = 7 C. 2x + 1 = 13 and x = 7 D. 2x – 1 = 13 and x = 11
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Answer:

B. 2x – 1 = 13 and x = 7

Step-by-step explanation:

We are given 4 equations and a solution for each. We have to tell which of the given solution satisfies the given equation.

Option A.

2x -1 = 13 and x = 6

Using this value in the equation, we get:

2(6) -1 = 13

12 - 1 = 13

11 = 13, which is not true. Hence this option is not valid

Option B.

2x - 1 = 13 and x = 7

Using the value in the equation, we get:

2(7) - 1 =13

14 - 1 =13

13 = 13, which is true. Hence this option is valid.

Option C.

2x + 1 =13 and x = 7

Using the value in the equation, we get:

2(7) + 1 = 13

15 = 13, which is not true. So this option is not valid

Option D.

2x - 1 = 13 and x = 11

Using this value in the equation, we get:

2(11) - 1 = 13

21 = 13, which is not true. Hence this option is not valid.

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