During the last 365 days, a weather forecaster's predictions have been right 292
days. They have been wrong 73 days.
15. What is the probability that the forecaster's prediction of tomorrow's weather
will be right?
16. Over the next 30 days, about how many times would you expect the forecast to
be right?

c

step-by-step explanation:

at least i think its

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

the correct answer for this just to make it clear for you guys is 2,3