Remember that

So if
and
, then we know
.
Then use the Pythagorean identity to solve for cosine:

Step-by-step explanation:
The product is carbon dioxide and water
Answer:
y = 2x+7
Step-by-step explanation:
This is equation is in the form
y= mx+b where m is the slope and b is the y intercept
y =2x + ? means we are looking for the y intercept which is the value of y when x is zero
From the table, x=0 and y=7
y = 2x+7