8th grade Math
posted by Mika .
I'm actually in 7th grade, but I'm doing 8th grade prealgebra, but anyway, here:
I'm supposed to simplify these four problems and I don't really understand how:
28s (15 power)
____
42s (12 power)
4m+(n[7th power]m)
63m(5 power)n(6 power)
______________________
27mn
3a·4a(4 power)
______________
28a(2 power)
Thanks!

i need help with this home work i need to write an algebraic expression for each word. 1.5 less than the prouduct of 3 and p

3p  1.5

how do you convert .833333333333....... into a fraction

what is more dense 14cm3 or 8cm3

five times the sum of a number and 2 is 25 find the number

how many tiles 15 cm square will be needed to cover a floor 5.8 m by 6.90m?

To anonymous 5(x+2) = 35 is the equation. Pretty easy to solve from there

thank u very much

Holy cow this question has a lot of answers!

Make .833333333333 as a fraction

Estimate the square root of 72 how to find it

To Jessica and Mrs Smith
5/6=.833333333
100x=83.333333333
10x= 8.333333333

90x=75
x=75/90=5/6. 
in scientific notation.
(2.74×10^7)+(5.6×10^7= 
The area of trapezium is 180cm and its hight is 9cm. If one of the parallel side ia langer then the other by 6cm, find the two parallel side.

The area of trapezium is 180cm and its hight is 9cm. If one of the parallel side ia langer then the other by 6cm, find the two parallel side.