Answer:
4
Step-by-step explanation:
since it's all addition, we can remove the parentheses
Now we combine like terms
We subtract both sides by 12 to get,
now we divide both sides by 11
Answer:
![\sqrt[ {?}^{2} ]{?} \frac{ \timesx}{?} |?| \sqrt[?]{?}](https://tex.z-dn.net/?f=%20%5Csqrt%5B%20%7B%3F%7D%5E%7B2%7D%20%5D%7B%3F%7D%20%20%5Cfrac%7B%20%5Ctimesx%7D%7B%3F%7D%20%20%7C%3F%7C%20%20%5Csqrt%5B%3F%5D%7B%3F%7D%20)
Step-by-step explanation:
choose brain
The surface area of a cylinder with circular bases of radius <em>r</em> and height <em>h</em> is equal to the sum of the areas of the two circular faces and the area of the rectangular lateral surface:
<em>A</em> = 2π<em>r</em>² + 2π<em>rh</em>
If you know the height <em>h</em>, then you can solve the quadratic equation for <em>r</em>.
Using the Pythagorean theorem a^2 +b^2 = c^2, where a and b are the sides of a triangle and c is the hypotenuse.
BA and AC are sides and BC is the hypotenuse.
we have 23^2 + b^2 = 45^2
529 + b^2 = 2025
b^2 = 2025 - 529
b^2 = 1496
b = sqrt(1496)
b = 38.68 = 38.7
The length of AC = 38.7
