Answer:
C
Step-by-step explanation:
6 + 3(x + 4)
= 6 + 3x + 12
= 3x + 18
Answer:
(x+7) times (x+3)
Step-by-step explanation:
Because a area of a rectangle is lw and you combine x and 3 to make x+3 and 7 and x to make x+7 and you multiply them together.
Ok so this is a difference of 2 perfect squares
1=1^2
49c^2=(7c)^2
to factor you remember
a^2-b^2=(a+b)(a-b) so
1^2-(7c)^2=(1+7c)(1-7c)
Answer: A train traveled486 miles in 7 hours
They would be going at least 40 - 70
Step-by-step explanation:
