8 grade math
posted by jenn k on .
Can somebody please help me I don't understand this problem.?
Determine whether each ordered pair is solution of y=x+3.
1. (2, 9) 2. (5, 23)
can you please explain this to me step by step till you get the answer .thank you so much.

Substitute the numbers in each ordered pair to x and y, respectively. If the equation makes sense, the it is a solution.
1. (2,9)
9 = 2 + 3 is not correct, so (2,9) is not a solution. 
*I meant to say then.

it could be 5!

The area of a square mirror is 256 in squared. A rectangle mirror has a width the same as the square mirror width. Its length is 2 in longer than its width. What is the area of the rectangle mirror?

PROBLEM:A BALL WAS DROPS 27 INCHES AFTER THE FIRST SECOND AND THIRD BOUNCE THE HEIGHTS WERE 18 12 AND 8 hOW MANY DID IT TAKE TO GET TO 3 INCHES

Here I know!
X I Y
0 I
0
wHAT YO HAVE TO DO IS SUBSTITUTE YOUR X SIDE FOR 0 AND MULTIPLY IT BY YOUR Y. 
DO THE SAME FOR THE OTHER SIDE