Question

tell whether the terms are like terms 3a and -5a

Answer 1

http://www.math.com/school/subject2/lessons/S2U2L4GL.html#sm1

Answer 2

i have another question how can i rewrite this expression as a sum -8x2 + 3xy - 9x - 3

Answer 3

the 2 is an exponent .

Answer 4

It's already a sum.

Answer 5

write -8x^2 to show an exponent.

notice that all the terms are different: different letters or different powers

Answer 6

i dont get it what is the sum ? and so 3a and -5a is a like terms ?

Answer 7

same letter to the same power is a "like term"
3a and -5a are "like terms" a^1 or simply a
so you can add: 3 a's take away 5 a's = -2a

Answer 8

also 2ab-5ab^2 -9a^2b

Answer 9

See http://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/v/combining-like-terms

Answer 10

as for
2ab-5ab^2 -9a^2b
These are all different terms, so that is as simple as it gets

ab would match ab or ba
ab^2 would match ab^2 or (b^2)a (order does not matter)
same for a^2 b

Answer 11

rewrite each expression as a sum "-8x^2+3xy-9x-3" "2ab-5ab^2-9a^2b" how do i rewrite these as a sum ??

Answer 12

they already are sums.
if you want to get fussy, you might write them alphabetically, highest order term first
the first expression is already in that order .
the 2nd might be written as
-9a^2b -5a b^2 +2 a b

but that is all you can do, and is not really necessary.

Answer 13

how can you express 499 to find the product 499 x 5 using mental math ? Explain.

Answer 14

thank you for all this help i suck in math :/

Answer 15

What easy number to multiply is very close to 499?

Answer 16

I would say 499 is almost 500 so 500*5= 2500
then subtract the 5*1 to get 2495

Answer 17

in other words (500-1)*5 is the same problem
use the distributive law to get : 500*5 -5= 5*5 * 100 - 5