Sara goes to Fredonia University. She has at least $900 in her savings account. She needs to buy a
small laptop computer before the next semester. The
laptop costs $600. Which inequality could represent
the situation, if a represents how much money is left
in her banking account?
a. a - 600 > 900
b. a + 600 2 900
c. 600 + as 900
d. 600 - a < 900

the answer is a i belaeve atleast thats what my calculator just gfave me

step-by-step explanation:

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