You find the rates of each computer on its own...
One does the job in 55 minutes which we can say is 1/55
The other has a rate of 1/45.
The question wants to know how long it would take both working simultaneously to complete the job...
t/55+t/45=1
(9t+11t)/495=1
20t=495
t=24.75 minutes (24:15)
Answer:
B .311
Step-by-step explanation:
Answer:
Step-by-step explanation:
Add 
and 
on both sides of the equation.
Divide 
on both sides of the equation.
Answer:
hi the answer is A
Step-by-step explanation:
Answer:
x = 18 units.
Area of triangle = 156 units^2.
Step-by-step explanation:
Area of the rectangle = 4(2x + 3) and the area of the triangle = 1/2*6*(3x - 2).
These are equal, so:
4(2x + 3) = 1/2*6*(3x - 2)
8x + 12 = 9x - 6
12 + 6 = 9x - 8x
x = 18.
Area of triangle = 1/2 * 6 * (3(18) - 2)
= 3 * 52
= 156 units^2.
