Answer:

Step-by-step explanation:
Let
x------> The money each friend must pay, including the tip
we know that

so


Answer:
it's a substitution because y was solved
Step-by-step explanation:
2x +2(3x-7)=10
you just replace the "y' by the solved y
then you solve parenthesis and continue the rest.
Answer:
The factors of x²-64 is equal to (x-8)(x+8).
Step-by-step explanation:
The given expression is:
x²-64
we know that, 8² = 64
So,
(x²-8²) = (x-8)(x+8) [As (a-b)(a+b) = a²-b²]
So, the factors of x²-64 i equal to (x-8)(x+8).
Answer:
254.47 to the nearest tenth is 254.5mm
Step-by-step explanation:
Hey! here's explanation:
A= π x r^2 (squared)
so A = π x 9mm^2
which gives you the answer of 254.47
TO THE NEAREST TENTH IS 254.5!
*hope this helps!*