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Vikentia [17]
2 years ago
15

I have five questions and I need some help. please help

Mathematics
1 answer:
Step2247 [10]2 years ago
5 0
The answer to the question

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

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.

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3 years ago
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Please help me I have no idea how to solve!
irinina [24]

Step-by-step explanation:

It says add across to the right and add  down bottom

                                                                                  Add across

                               3x                              2x^2                 3x +2x^2

                               x^2                              5x                    x^2 + 5x

Add down            3x + x^2                        2x^2 +5x            3x^2 +8x

3 0
2 years ago
The inverse variation equation shows the relationship between wavelength in meters, x, and frequency, y.
bulgar [2K]

Answer:  A

y=\dfrac{3*10^8}{x}\\\\if\ x=3*10^9\ then\\y=\dfrac{3*10^8}{3*10^9}=\dfrac{1}{10}=1*10^{-1}\ (m)

3 0
2 years ago
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Y> - 1/2 x + 3
Anna11 [10]

Answer:

0,3

Step-by-step explanation:

enter in a graphing calculator see where you hits 0

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3 years ago
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