Brent paid for 6 avocados with a $20.00 bill. He received $10.40 in change. Which equation can be used to find the price, P, of each avocado? A. 6p + 20 = 1040
B. 6p- 1040=0
C. 6p - 20 - 16.10
D. 6p + 10 40 = 20

D

Step-by-step explanation:

Let's start with finding out how much he had to pay. 20-10.40 will give us that answer. That will equal the cost of 6 avocados, giving us an equation of

20 - 10.40 = 6p

Now we'll see which equations match this. Bingo! Answer number D is the same equation with 10.40 added on both sides.

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