Each nurse buys a gift for another nurse in a
hospital. how many nurses are there in the
hospital, if 72 gifts bought in total?

answer:

72

step-by-step explanation:

the ratio of nurses to gifts is 1: 1 -- each nurse must purchase one gift, meaning that the total number of gifts is also the total number of nurses.

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

answer: '

the distance between points l and m

step-by-step explanation: