Answer: = 
Step-by-step explanation:
First, Combine Like Terms:
= 3x^2 + −5x^2 + 4x^2
=(3x^2+ −5x^2 + 4x^2)
=2x^2
* Hopefully this helps:) Mark me the brainliest:)!!
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Answer is i think c
I think C
Answer:
x = 15
Step-by-step explanation:
Substitute: -4/5x + 7 = -5
Rearrange unknown terms to the left side of the equation: -4/5x = -5 - 7
Calculate the sum or difference: -4/5x = -12
Divide both sides of the equation by the coefficient of variable: x = -12 × (-5/4)
Remove the parentheses: x = 12 × 5/4
Cross out the common factor: x = 3 × 5
Calculate the product or quotient: x = 15
So the answer is: x = 15
Answer: a= $24.99
b= $39.98
I hope this helps
Step-by-step explanation: