What is the value of 2 to the power of 3 x 5 to the power of 2 - 3 to the power of 2 ?

  191

Step-by-step explanation:

2³×5² -3² = 8×25 -9 = 200 -9 = 191

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This is a good problem for your calculator.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

answer:

125 yards

explanation:

75+50=125. that is my answer