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 =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

the equivalent expression are always the hardest ones but you look at the gcf also

step-by-step explanation: