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kolbaska11 [484]
3 years ago
14

Which of the following values of r will result in a true statement when substituted into the given equation? -r + 5(r + 2) = -10

A. r = -6 B. r = -5 C. r = 0 D. r = 1
Mathematics
2 answers:
kramer3 years ago
6 0

Answer:

Choice B is correct.

Explanation:

The given equation is -r+5(r+2)=-10

Put r=-5 into the above equation

-(-5)+5(-5+2)=-10

5+5(-3)=-10

5-15=-10

-10=-10

Right and left side of above equation is equal by putting r=-5 so it is true statement.

const2013 [10]3 years ago
5 0

Answer:

b

Step-by-step explanation:

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Factor 6x4 – 5x2 + 12x2 – 10 by grouping. What is the resulting expression?
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Your answer would be the last option, (6x² - 5)(x² + 2).
This is because when you expand it, you get:
6x² × x² = 6x⁴
6x² × 2 = 12x²
-5 × x² = -5x²
-5 × 2 = -10
Which are all the correct terms.

I hope this helps!
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