F(x)=y
y is considered to be the value of f(x)
Looking at a table, when x=4, the corresponding y value is the value of f(4)
The answer to this question would be 39..here is why:
First you multiply 23 x 3..because multiplication or division always comes before addition or subtraction.
Second, you get the product from 23 x 3 which is 69..and you subtract 30 from that.
Last, after you do that you get an over all answer of 39..
Hope this helps!!
You need to ask your teacher for any help and to evaluate and double check each step.
I’m not exactly sure what the question is asking, but assuming that the equation is r=10b^2, then the answer would be r=40.
The coordinates are (-4,0),(0,-1)
