Answer:

Step-by-step explanation:
If a parabola has its vertex on the y-axis, then its equation is

This parabola passes through the point R(3,9), then

The area of the right triangle PQR is

Find PQ and QR, if 

Now,

We get two possible points
and 
For point 

So,

For point 

So,

(-3, 2) is the coordinate. I am not too sure what the rule is. It is possibly -3x+2.
Answer:
k = 4
Step-by-step explanation:
17 = 5k - 3
+3. +3
20/5 = 5k/5
4 = k
k = 4
Answer:
0.05 periodic.
Step-by-step explanation:
let's do 52/936.
Answer:
I think the answer is m= -1/3 b=7/3
Explanation:
so first, you need to make equations using the info that the question gave.
f(-2)= m(-2)+b f(4)= m(4)+b
= -2m+b =4m+b
f(-2)= 3 f(4)= 1
-2m+b= 3 4m+b=1 -(2)
b= 3+2m -(1)
substitute (1) into (2) : 4m+(3+2m)=1
4m+2m+3=1
6m=1-3
6m= -2
m= -2/6
m= -1/3
Substitute m= -1/3 into (2)
4(-1/3) + b=1
-4/3 +b =1
b= 1+ 4/3
b= 7/3
Therefore, m= -1/3 b=7/3
and that's how you do it