3 + 5(9+2n)
Distribute the 5 to the items in the parentheses
3 + 5(9+2n)
3 + 45 + 10n
Combine like terms
48 + 10n
Answer:
first and fourth
Step-by-step explanation:
x² - 4 = 0 ( add 4 to both sides )
x² = 4 ( take square root of both sides )
x = ±
= ± 2
that is x = - 2, x = 2
4x² = 16 ( divide both sides by 4 )
x² = 4 ( take square root of both sides )
x = ±
= ± 2
that is x = - 2, x = 2
Answer:
√
30
Step-by-step explanation: Simply multiply
√
2
and
√
15
=
√
30
[Caution: If it were -2 and -15, this type of multiplication would not be correct.]
Answer:
262.5 messages per month
Step-by-step explanation:
Cost of plan = $34.99
Cost per message = $0.16
Maximum bill = $42
Maximum # of messages = $42/$0.16 = 262.5