Answer:
It is the second one and the last one.
Step-by-step explanation:
I would say solve for x in the second equation
The sum of the polynomials (8x²-9y²-4x)+(x²-3y²<span>-7x) is:
1. You must add the terms whose variables and exponents are the same.
2. Let's rewrite the polynomials:
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(8x²-9y²-4x)+(x²-3y²-7x)
8x²-9y²-4x+x²-3y²-7x
(8+1)x²+(-4-7)x+(-9-3)y²
3. Therefore, the result is:
9x²-11x-12y²
3. <span>What is the sum of the polynomials?
The answer is: </span>9x²-11x-12y²
Use distance, time and speed formula.
speed = 4m/mins
distance = 5.12 meter
time = distance/speed
time = 5.12/4
time = 1.28 minutes
It walks 1.28 minutes
hope this help you !!!!!!!!!
