Answer:
x = -6
Step-by-step explanation:
Combine like terms.
5x + 6 = -24
Subtract 6 from both sides.
5x = -30
Divide by 5 on both sides.
x = -6
So area is base x height:
5(x+2)=20
5x+10=20
5x=10
x=2
its A
9514 1404 393
Answer:
F20 = 15985k -20361g
Step-by-step explanation:
If we assume F3 and F4 are the third and fourth terms of an arithmetic sequence, the common difference is ...
d = F4 -F3 = (945k -713g) -(5k +515g)
d = 940k -1228g
Then the 20th term is ...
F20 = F3 +(20 -3)d = (5k +515g) +17(940k -1228g)
F20 = 15985k -20361g
Answer: number of blue pen = 128
Number of pen in the box = 320
Step-by-step explanation:
(x² + 16)(x² - 16)
= (x²)² - 16²
= x⁴ - 256