To calculate the charge for a load of bricks, including delivery, the redstone
brick co. uses the equation c = 0.42b + 25, where c is the charge and b is
the number of bricks. what is the delivery fee per load?

Step-by-step explanation:

C = 0.42b + 25

C = what ur gonna be charged

b = number of bricks

since b is the number of bricks, this equation is saying that each brick cost 42 cents. So that takes care of the bricks, but this equation also includes a delivery feethe 25so they are charging a $ 25 delivery fee per load

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a