B. 75
First you find the area of the triangle:
(base x height)/2
(3 x 5)/2
15/2
7.5
Then you multiply by the length of the prism (10):
7.5 x 10 = 75
Answer:
40
y = ----
3
Step-by-step explanation:
Answer:
![a_n=-7+4(n-1)](https://tex.z-dn.net/?f=a_n%3D-7%2B4%28n-1%29)
or
![a_n=-7+(n-1)(4)](https://tex.z-dn.net/?f=a_n%3D-7%2B%28n-1%29%284%29)
Step-by-step explanation:
-7,-3,1,5,... is a arithmetic sequence.
Arithmetic sequences have a common difference. That is, it is going up by 4 each time.
When you see arithmetic sequence, you should think linear equation.
The point-slope form of a line is
.
m is the common difference, the slope.
Any they are using the point at x=1 in the point slope form. So they are using (1,-7).
So let's put this into our point-slope form:
![y-(-7)=4(x-1)](https://tex.z-dn.net/?f=y-%28-7%29%3D4%28x-1%29)
![y+7=4(x-1)](https://tex.z-dn.net/?f=y%2B7%3D4%28x-1%29)
Subtract 7 on both sides:
![y=-7+4(x-1)](https://tex.z-dn.net/?f=y%3D-7%2B4%28x-1%29)
So your answer is
![a_n=-7+4(n-1)](https://tex.z-dn.net/?f=a_n%3D-7%2B4%28n-1%29)
Answer:
4355646
Step-by-step explanation:
45345