Answer:
22
Step-by-step explanation:
Let the bottom be y for the small triangle
So the total length of the bottom is 2y
We can use ratios to solve
x-1 1y
----- = --------
42 2y
Canceling the y's
x-1 1
42 2
Using cross products
2(x-1) = 42
Divide by 2
x-1 = 21
Add 1 to each side
x-1+1=21+1
x = 22
2/5
(2/3) * (3/5) = 2/5
I think it is 2/5, but the problem seems a bit odd.
The expected values from the product of 2 marbles are 1,2,3,4,5,6,8,10,12,15,20
THe expected values are 1,2,3,4,5,6,8,10,12,15,20
Negative! -5/2
.......
y = -5x + 3
Using slope intercept form
y = mx + b