Given
A triangle.
with vertices at (−2, 1) , (2, 1) , and (3, 4)
Find out the area of a triangle.
To proof
Formula

As given the vertices at (−2, 1) , (2, 1) , and (3, 4)
put in the above equation
we get
![= \frac{1}{2} [-2(1-4)+ 2 (4-1) + 3 ( 1-1) ]](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B1%7D%7B2%7D%20%5B-2%281-4%29%2B%202%20%284-1%29%20%2B%203%20%28%201-1%29%20%5D)
solving
![= \frac{1}{2} [6 + 6]](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B1%7D%7B2%7D%20%5B6%20%2B%206%5D)
thus
![=\frac{1}{2} [12]](https://tex.z-dn.net/?f=%3D%5Cfrac%7B1%7D%7B2%7D%20%5B12%5D)
area of the triangle is 6 units².
Hence proved
Answer:
Step-by-step explanation:
F (x) = 1 – 4x
Calculate the value of f (2)
Subsitution 1-4(2)=1-8=-7
The answer of f(2)=-7
I hope this answers ur question
Answer:
Step-by-step explanation:
go to the back of the book
Initialfee+variablefee=total
initialfee=12
variaablefeet=hours times 5
total=27
27=12+5 times hours
minus 12 both sides
15=5 times hours
divide both sides by 5
3=hours
rented 3 hours