Again, a spreadsheet or suitable calculator makes this short work.
The sum is 184.
_____
The terms being summed are ...
2·3² +3 = 2·9 +3 = 18 +3 = 21
2·4² +3 = 35
2·5² +3 = 53
2·6² +3 = 75
Their total is
21 +35 +53 +75 = 184
Answer:
A train travels at a constant rate of 40 miles per hour. How many miles will it travel in 3 hours?
Step-by-step explanation:
120.
40 x 3
=
120
Answer:
f(-3) = 15
Step-by-step explanation:
Given that,
f(x) = -x + 12
You have to solve for,
f(-3) = ?
For that,
you have to put (-3) instead of x
f (-3) = -x + 12
= -(-3) + 12
= +3 + 12
= 15
Hope this helps you.
Let me know if you have any other questions :-)
Answer:
2
Step-by-step explanation:
5*2=10
10+10=20
or
5*x+10=20
10-10=0
20-10=10
5*x=10
5/5=0
10/5=2
x=2
First combine the like terms 5w and -4w to get just w.
so now the problem looks like:
w + 4= 14
subtract 4 from each side now. and you get the answer:
w = 10
