The answer is 726 ft Im pretty sure.
It is close to 8. When you look for the square root of 59 you should get about 7.6811457... Round up and thats 8 round down that 7 but it should be 8.
If he can make 12 salads in 20 minutes and there are only 45 minutes available he can make 27 salads.
2 x 20 = 40
20 / 4 = 5
40 + 5 = 45
now do the same for 12.
2 x 12 = 24
12 / 4 = 3
24 + 3 =27
18x + 20 + x = 10x -3
Combine like terms
19x + 20 = 10x -3
Subtract 20 to both sides because whatever you do on one side you have to do it on the other side:
19x = 10x -23
Subtract 10x
9x = -23
Divide 9 to isolate x:
x = -23/9
Simplify to get a mixed number:
x = -2 5/9