A, B and C together can finish a piece of work in 4 days, A alone can do it in 12 days and B alone in 18 days. How many days will be taken by C to do it alone?

9 days

Step-by-step explanation:

Let x = days taken by C to do it alone

In one day, A can do: 1/12 (part of the whole work)

In one day, B can do: 1/18 (part of the whole work)

In one day, C can do: 1/x (part of the whole work)

In one day,together A, B and C can do: 1/4 (part of the whole work)

we have this equation:

1/x + 1/12 + 1/18 = 1/4

--> 1/x = 1/4 - 1/12 - 1/18 = 1/9

--> x = 9 (days)

false

step-by-step explanation:

false.   two legs of the trapezoid would be congruent, but the other two would not.   were all the legs congruent, then we'd have a square; were the 2 shorter sides congruent and the 2 longer sides also congruent, we'd have a rectangle.

the answer is:

the answer is:

to solve the problem, we need to remember the quotient of power property, it's defined by the following relation:

if we have a quotienf of powers that have the same base, we need to keep the same base and subtract the exponent of the denominator power to the exponent of the numerator power.

so, we are given the expression:

then, calculating we have:

hence, the answer is:

have a nice day!