Answer:
28
Step-by-step explanation:
Let n = 21, and evaluate the expression.






Answer:
B
Step-by-step explanation:
The equation is (2x+5)^2.
It can't be A because 2 is the multiplier for only x.
It can't be C because the square is outside of the equation.
It can't be D because again, the square is outside of the equation.
So the only thing left is B.
Hope this helped!
Answer:
432ft^2
Step-by-step explanation:
24/2=12
3 x 12 x 12=432
Answer:
Here's what I got. First of all, did you meant y=mx+b+mx+mxy+mx=b, because that's undefined, or did you meant y=mx+b+mx+mx, which is b=−3mx+y.
Answer:
3x³+10x²-8x-2
Step-by-step explanation:
(-3x³+7x²-8x+11)-(-3x²+13)
- remove unnecessary parentheses
-3x³+7x²-8x+11-(-3x²+13)
-3x³+10x²-8x+11-13
-3x³+10x²-8x-2