P= a+b+c is the way to find the perimeter of a triangle
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Answer:
rcfnjcndcndc
Step-by-step explanation:
d
Answer: C. 7x^2+4x-5
Step-by-step explanation:
Add as you would normally. Exponents can look scary but don’t mind them. First add 5x^2 & 2x^2 to get 7x^2. Then do -5x + 9x. An easier way of doing that would be 9x-5x to get 4x. Lastly do 1 -6 to get 5.
This is the sum of cubes which factors to:
(x+2)(x^2-2x+4)
Sub a =3 and b = 5 into the expression above you get:
8*3+6(2*5-7)
then use bedmas accordingly (this is the order of arithmetic operations)
8*3+6(2*5-7)
=24+6(10-7)
=24+6(3)
=24+18
=42
