Answer:
Step-by-step explanation:
First, let's start with what we have. If we use 
here's what we can put in:
Then we can use one of the given points to find the y-intercept. Since the only complete one is (12,10), we'll use that.
So now we have 
.
Now we can use our other point with the missing y-value and solve for y.
So the missing value is 64.
Hope this helps!
I took this class last year... how could I have forgotten all of this???
The acute angles of a right triangle are complementary, so
α + β = 90
(5x/3 +20) + (2x/3) + 14) = 90 . . . . . . substitute given values
7x/3 +34 = 90 . . . . . . . . . . . . . . . . . . . collect terms
7x/3 = 56 . . . . . . . . . . . . . . . . . . . . . . . subtract 34
x = (3/7)*56 = 24 . . . . . . . . . . . . . . . . . multiply by 3/7
Then the value of α is ...
α = 5*24/3 +20 = 60
