Answer:
3,6
Step-by-step explanation:
x+y=9
x-y=-3
Adding these two equations we get 2x = 6, x=3
y=6
Answer:
220.8
Step-by-step explanation:
I believe 220.8
sorry if I am wrong.
This is what I got hope it helps!
Answer:
49 - x^2
Step-by-step explanation:
(7+x)(7-x)
We know this is the difference of squares
(a-b) (a+b) = a^2 - b^2
7^2 - x^2 = 49-x^2
We can also FOIL
first = 7*7 = 49
Outer: = 7x
Inner: = -7x
Last : -x*x = -x^2
Add them together
49 +7x-7x - x^2
Combine like terms
49-x^2
Victoria buys 2 pairs of sunglasses for $8 each
1 pair of glasses = $8
8 x 2 = total amount
multiply
8 x 2 = 16
total amount = 16
She payed $16 for both pairs of glasses.
hope this helps
