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victorialeverp714lg
21.12.2019 •
Mathematics
Harlon wrote the equation a=18(x^2+1) to find the area of a rectangle that has a length of x^2+1 and a width of 18. he solved for x and got x= ±√(a/18 -1). which of the following is an equivalent equation for x?
a. x= ±√(a-18/18)
b. x= ±√(a+18/18)
c. x= ±√(a-36)
d. x= ±√(a+36)
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Ответ:
To solve for x in the equation for the area which was given to be , A = 18(x^2 + 1), we divide both sides of the equation by 18 first.
A/18 = x^2 + 1
Then, we subtract 1 from both sides of the equation,
A/18 – 1 = x^2
Then, we simplify the expression in the left side of the equation,
(A – 18)/18 = x^2
And finally, obtain the square root from both sides of equation,
Sqrt ((A-18)/18) = x
The expression equivalent to this is letter A.
Ответ:
D I think
Step-by-step explanation:
none of the others look right