Let the number be x
X *8 = 8x
8x-66= twice of the number
8x-66=2x
-66=2x-8x
-66=-6x
Divide both sides by -6
X=11
HCF is 7 do you need explanation
We have
(1) two rectangles 3' × 5'
(2) two rectangles 3' × 6'
(3) two rectangle 5' × 6'
The formula of an area of a rectangle: A = lw
l - length
w - width
A(1) = 3 · 5 = 15 in²
A(2) = 3 · 6 = 18 in²
A(3) = 5 · 6 = 30 in²
The Total Area:
<h3>T.A. = 15 + 18 + 30 = 63 in²</h3>
15.5 is rounded to the nearest tenth. If you're looking for which number is closest to a whole number then it would be 16 since 5 is always rounded up. Hope this helped :)