Find ST if S is between R and T, SR = 2x + 7, ST = x - 6, and RT = 100

1 answer:

7 0

Since SR+ST adds up to RT, we have 2x+7+x-6=100=3x+1.
Subtracting 1 from both sides, we get 3x=99

Dividing both sides by 3, we have x=33

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Which of the following are solutions to the equation below? Check all that apply. 9x^2-64=0

nikdorinn [45]

Answer:

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Step-by-step explanation:

9x^2-64=0

Add 64 to each side

9x^2-64+64 = 0+64

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Divide each side by 9

9x^2/9 = 64/9

x^2 = 64/9

Take the square root of each side

sqrt(x^2) = ±sqrt(64/9)

We know that sqrt(a/b) = sqrt(a)/sqrt(b)

x = ±sqrt(64)/sqrt(9)

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