Try this solution (note, this is not the shortest way):
1. if the given length is 'l' and the width is 'w', then according to the condition 4*l=w;
2. according to the condition the perimeter is 30 ft. Formula of the perimeter is P=2(l+w), then 2(l+w)=30;
3. if to substitute '4*l' instead of 'w', the formula of the perimeter (from item no. 2) will be as 2(4*l+l)=30 or 10*l=30 ⇒ l=3 ft. The length is 3 ft.!
4. if l=3 ft., then w=4*3=12 ft. The width is 12 ft.!
5. Area is
A=w*l; A=12*3=<u>36 ft²</u>
Answer:
Step-by-step explanation:
-1/2x+3-4x+5+3/2x
=-1/2x+3/2x-4x+3+5
=x-4x+8
=-3x+8
So the employee rate for washing cars turns out to be 4*5 = 20 man hours to wash 20 vehicles which is 1 vehicle per hour per employee.
<span>5 employees will wash 5 vehicles in 1 hour </span>
<span>5 employees will wash 20 vehicles in 1*4 = 4 hours.</span>
<span>61.6 feet and second.</span>