The expression 0.09x+(x−30) models the final price of a bicycle with an instant rebate in a state that charges a sales tax. the tax is on the original price. which expression represents the amount of tax that is paid on the bicycle?

Just took the test the answer was 0.09x. Key words being "Which expression represents" & "Amount of tax that is paid on the bicycle" in the word problem.

Just took the test the answer is 100% 0.09x

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

he can buy 4lbs. of live bait and 1lbs of natural bait

step-by-step explanation: