87 x 57 = 4959
20000/4959 = 4.033071184
density = 4 fans per yard²
Answer:
The missing value is 10
Step-by-step explanation:
-3 = 7 -x
Solve for x
Subtract 7 from each side
-3-7 = 7 -x -7
-10 = -x
Multiply by -1
-10 * -1 = -x*-1
10 =x
Answer:
x = 5 or x = -11
Step-by-step explanation:
(x+3)²+8=72
x² + 6x + 9 + 8 = 72
x² + 6x -55 = 0
(x - 5) (x + 11) = 0
x = 5 or x = -11
Answer:
3.125
Step-by-step explanation:
