94%.
<span>50 x 2 = 100 </span>
<span>47 x 2 = 94 </span>
<span>Percent means per hundred so you need to times 50 by whatever the number is that makes it 100. You need to do this on both sides so you do the same with the 47.</span>
Here with substitution
8x - 2(-4x + 15) = -30
8x + 8x - 30 = -30
16x = 0, x = 0
8(0) - 2y = -30
-2y = -30, y = 15
The answer: x = 0, y = 15
N=55
A^2 + B^2 = C^2
48^2 + B^2 = 73^2
2304 + B^2 = 5329
-2304 -2304
B^2 = 3025
Sqrt B^2= sqrt 3025
B= 55
3. (a.)
<span>Volume of block = 20 cm x 9 cm x 8 cm = 1440 cm^3 </span>
<span>(b.) </span>
<span>Volume of cylinder = pi * (radius)^2 * (height) </span>
<span>Plugging dimensions in: </span>
<span>Volume = pi * (10 cm/2)^2 * (15 cm) </span>
<span>= pi * (5 cm)^2 * (15 cm) </span>
<span>= 1178 cm^3 to the nearest centimeter </span>
<span>(c.) </span>
<span>Remaining volume = 1440 cm^3 - 1178 cm^3 = 262 cm^3 </span>
<span>Volume of cube = side^3 = 262 cm^3 </span>
<span>Taking cube root, side = 262^(1/3) = 6 cm to the nearest cm</span>