Mr r can eat 16 big macs in 4 hours. we want to determine how many big macs he eats per hour. write a rate to represent the situation. find the unit rate and write it in word form.

To find the number that goes with units of (BigMacs/hour), you divide the number of BigMacs by the number of hours (as the units suggest).

... (16 Big Macs)/(4 hour) = 4 Big Macs/hour

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb