First Answer. 6x-2y=16. This added to 4x-5y=2 is equal to 10x-7y=18
Answer:

Step-by-step explanation:
It's already in a form that only ha positive exponents. Just to state it though you could rewrite it as
or
The question asks for positive exponents though so yu don't need to do that.
You also need to know
so in this case 
so 
we can use properties of functions to find this out
for 
if b is even, then the ends of the function go in the same directions (both up or both down)
if b is odd, then the ends of the function go in different directions (one up and one down)
if a is positive and b is even, then both ends point up
if a is positve and b is odd, then it goes from bottom left to top right
if a is negative and b is even, then both ends point down
if a is negative and b is odd, then it goes from top left to bottom right
given 
a=5>0
b=4 which is even
so it has both ends pointing up
bottom right graph is yo answer
70 pieces
7/10 = x/100
10*10=100
7*10 = 70
70/100
Answer:
She has 17 video games. (Possible answer.) Hope this helps!
Step-by-step explanation:

-5. -5

2. 2

or 17 since it is less than 17.2