Eric goes to the store to buy ingredients for dinner. He needs ground beef, shredded cheese, salsa, and tortillas. The ground beef costs $3.79, the shredded cheese costs$2.69, the salsa costs $3.77, and the tortillas cost $5.00. He has the following coupons: $1.50 off ground beef, $0.50 off shredded cheese, and $1.00 off salsa. Part A: What is the total cost of the items before Eric uses the coupons?

Part B: What is the total of all of the coupons?

Part C: How much will Eric pay after he uses the coupons?

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

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

kekdkdkccc

so

step-by-step explanation:

kekdkckcldlx

(x) - (y) = (1 + 4i)