The relation is not a function because the value 3 in the domain is paired with two different values in the range.
Good luck!!!
They way I would do it other than with a calculator would be
27 x (90 - 0.5) which is the same as 27 x 89.5
=> 27 x 90 - 27 x 0.5
27 x 90 is (3 x 9) x 90 or 3 x 9 x 90
9 x 90 = 810
3 x 810 = 2430
Then subtract 27 x 0.5, or 27 / 2
2430 - 27 / 2
=> 2430 - 13.5
= 2416.5
Final answer:
2416.5
Hope I helped :)
Answer:

Step-by-step explanation:
Given


c = hypotenuse
Required
Find c
Using Pythagoras theorem, we have:

Substitute values for a and b



Take square roots of both sides:

Express 20 as 4 * 5

Split surd

Take square root of 4


because the y-intercept is 3, you'll place your first point up 3 on the y-axis (so (0, 3)). From there you can use your slope to graph the rest
Because your slope is -6, rise over run tells you it's pretty much -6/1, thus, from the point you placed on the y-axis you go down 3 places, and to the right 1. This makes your next point (-3, 1). For your last point you use your rise over run vice versa and go up 6 places, and to the left 1. This point would be (8, -1). If you connect these 3 points you'll have a pretty good graph
You have to write an equation that can help you solve the problem like x + 4 = 26 then solve for x.