Answer:
y = 2x² + 16x + 11
Step-by-step explanation:
first foil (x + 4)² to get x² + 8x + 16
distribute 2 to get 2x² + 16x + 32
subtract 21 from 32
Answer:

Step-by-step explanation:
This is a 45-45-90 triangle
Answer:
Step-by-step explanation:
23 divided by X. X=half of 23. but really, you need to add to it. other than that i can't help ya, all i know is that half of 23 is 11.5
Answer:
Meaning
Step-by-step explanation: