Answer:
c =4 4/9 minutes
Step-by-step explanation:
The formula is
1/a + 1/b = 1/c where a and b is the time for each working alone and c is the time working together
1/8 + 1/10 = 1/c
Multiply by 40c to clear the fractions ( 40c is the least common multiple)
40c(1/8 + 1/10 = 1/c)
5c + 4c = 40)
9c = 40
Divide by 9
9c/9 = 40/9
option 4 and 6
0,8,5
x+22 <32
Subtract 22 from each side
x+22-22 <32-22
x <10
The choices that fit
linear.
rotary.
reciprocating.
oscillating.
hope it wil help you
