Lin is selling boxes of cookies. Each box costs $3.75. Lin’s goal is to earn more than $30 selling cookies. 1.If Lin sells 20 boxes of cookies, will she make her goal?

2.If Lin sells b boxes of cookies, write an inequality (using the symbol ) that will be true whenever Lin makes her goal, and false whenever she does not.

If you help me you will get 15 points!!! please help me

answer:

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

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so

step-by-step explanation:

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answer: (-6,3)

step-by-step explanation: