Answer:
together rate = 1/20 min/job
one comp. rate = 1/(x-9) min/job
2nd comp. rate = 1/x min/job
-------------------------------
Equation:
rate + rate = together rate
1/x + 1/(x-9) = 1/20
---
20(x-9) + 20x = x(x-9)
40x-9*20 = x^2-9x
---
x^2-49x + 180 = 0
Factor:
(x-45)(x-4) = 0
Realistic solution since 4-9 is negative:
x = 45 minutes
then
x-9 = 36 minutes (faster computer time to do the job)
Step-by-step explanation:
Answer:
Option B. 
Step-by-step explanation:
we have
Solve for w
That means ----> isolate the variable w
Multiply by 5 both sides to remove the fraction
subtract 8 both sides
Rewrite
To find the answer you would multiply 1,300 by .06, which gives you a commission of $78.
Hope this helps!
To find the awnser, the equation would be: the volume of the can - the volume left
to find the value,we can use 3.14 for 丌
The volume of the can would be the base area (丌r^2)times it's height,which in this case the volume is:
3.14(5)^2×12
=3.14×25×12
=942 cm³
The volume left:
3.14(5)^2×4
=314cm³
Thus,Mishka used:
942-314
=628 cm³
The answer is 628cm³
Hope it helps!
