Answer:
$100
Step-by-step explanation:
We can see from the graph that the rate of change is $20. This is because for every increase in x, the value of y increases by $20.
Going from this, the value at x=4 is $80; this will make the value at x=5
80+20 = 100
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Okay, first, given the equation, we need to find out what the radius of the circle is. Let us state the general equation of a circle:

Where

is the centre of the circle. In this case, we don't need to know the centre. Just the radius.
Let us start by converting the equation into standard for, which I typed above. Divide both sides by 81.

Great! We now know the radius of the circle. It is

because it is the bottom fraction. Now we know that the radius is 9.
So now lets input this into the area of circle formula:
Now we insert our radius.
You can convert that into a decimal if you wish.
Hope this helped!
~Cam943, Moderator
Answer:
4.5 x 14 = 63
Explanation:
The area of a parallelogram is the product of any base and the altitude to that base: A = bh.
Answer:
C. (7, 14)
Step-by-step explanation:
You are given the equation and points (x, y) to plug into that equation. See which ones satisfy. The left side must equal the right side (7 in this case) when evaluating...
-5(7) + 3(14) = 7
-35 + 42 = 7
7 = 7
The point (7, 14) works. The other points will not yield the same result..
EX: (2, -1)
B is a wrong answer because...
-5(2) + 3(-1) = 7
-10 - 3 = 7
-13 = 7
-13 does not equal 7, so that is a wrong answer