Question

URGENT

Can I have exact answers to this five question multiple choice math practice?

http://postimg.org/image/ll88a0hyh/

Answer 1

Why...

Answer 2

I've tried doing it but I can't. My teacher won't help me and I need to finish the assignment.

Answer 3

Well for numbers 1 and 2 you just multiply. Remember if it's just multiplication it can be done in any order.
I would multiply the numbers first, remember negative times positve gives negative.

Then for variables with powers. y^-1 is 1/y.
m^-2 is 1/(m^2)

\[x^3*x\] is the same as x*x*x*x, or \[x^4\]. So when you multiply variables to the same powers together, keep the variable and its exponent you get by adding the powers together. The exponent of x^3 is 3 and exponent of x is 1, and 3+1=4, hence the product is x^4

Answer 4

Now knowing that, what did you get for 1 and 2

Answer 5

I got -15x^4y for #1, and I got -18m^6n^30 for #2.

Answer 6

I think I understand now. Thank you.

Answer 7

Ok the first one is correct but not the second

Answer 8

When you have a negative exponent, you rewrite it by putting it into the denominator and making the exponent positive.
For example, \[x^-1\] is the same as \[\frac{ 1 }{ x }\]

And \[2x^-1\] is the same as \[\frac{ 2 }{ x }\]