Answer:

Step-by-step explanation:
Given

Required
Simplify
We have:

Open brackets

Collect like terms


It is (1,15). I recommend using a website called desmos because it helps with graphing.
X^2 = 7^2 - 3^2
x = root40
Answer:each book cost 39 dollars
Step-by-step explanation:
Since she had 16 dollars left over afterwords subtract 16 from 289 which leaves you with 273. then take the 273 and divide by the 7 books she bout whic will become 39 dollars therefore each book cost 39 dollars
Answer:
sorry i cant read it
Step-by-step explanation: