The answer would be b=a/c
9514 1404 393
Explanation:
Both sides of the equation are squared.
![\dfrac{x-12}{4}=\sqrt{x} \qquad\text{given}\\\\ \left(\dfrac{x-12}{4}\right)^2=x \qquad\text{square both sides}\\\\ \left(\dfrac{x}{4}-3\right)^2=x \qquad\text{divide out the fraction}\\\\ \dfrac{x^2}{4^2}-\dfrac{6}{4}x+9=x \qquad\text{$(a-b)^2=a^2-2ab+b^2$}\\\\\dfrac{x^2}{16}-\dfrac{5x}{2}+9=0 \qquad\text{subtract $x$}](https://tex.z-dn.net/?f=%5Cdfrac%7Bx-12%7D%7B4%7D%3D%5Csqrt%7Bx%7D%20%5Cqquad%5Ctext%7Bgiven%7D%5C%5C%5C%5C%20%5Cleft%28%5Cdfrac%7Bx-12%7D%7B4%7D%5Cright%29%5E2%3Dx%20%5Cqquad%5Ctext%7Bsquare%20both%20sides%7D%5C%5C%5C%5C%20%5Cleft%28%5Cdfrac%7Bx%7D%7B4%7D-3%5Cright%29%5E2%3Dx%20%5Cqquad%5Ctext%7Bdivide%20out%20the%20fraction%7D%5C%5C%5C%5C%20%5Cdfrac%7Bx%5E2%7D%7B4%5E2%7D-%5Cdfrac%7B6%7D%7B4%7Dx%2B9%3Dx%20%5Cqquad%5Ctext%7B%24%28a-b%29%5E2%3Da%5E2-2ab%2Bb%5E2%24%7D%5C%5C%5C%5C%5Cdfrac%7Bx%5E2%7D%7B16%7D-%5Cdfrac%7B5x%7D%7B2%7D%2B9%3D0%20%5Cqquad%5Ctext%7Bsubtract%20%24x%24%7D)
I like this better without fractions, so would multiply by 16 at this point (or earlier).
x^2 -40x +144 = 0
(x -36)(x -4) = 0
x = 4 or 36 . . . . . . x = 4 is extraneous
The solution is x = 36.
Answer:
Your answer is: No solution
Step-by-step explanation:
Hope this helped : )
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Answer: I think it would be 3.5
Step by Step Explanation: BRAINLIEST?!?
2x+38=180
2x=142 (or x+x=142 from which 2x=142)
x=71
The unknown angles are each 71
You know this answer is logical as, since two sides are 21 it hints that we are looking at an equilateral triangle, which means two of its angles will be the same