Li bought five lip balms. Each lip balm costs the same amount. She spent a total of $7.25. a. Using the variable c to represent the cost of each lip balm, write an equation that represents the situation. (1 pt)

b. Solve the equation. (2 pts – 1 pt correct answer, 1 pt for showing work)

divide the cost of the lip balm by 5

Step-by-step explanation:

7.25=5c

7.25/5=c

c=1.45

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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