Can you please answer fast

36 pounds

Step-by-step explanation:

so J:Y = 3:4  

63 divided by 3 is 21

and 4 times 21 is 84

So we know that there's 84 pounds of grain in bin Y

Then we do the same thing to the Y:Z ratio, which is 7:3

84 divided by 7 is 12

and 3 times 12 is 36

the answer is 36 pounds

if he has no friends he cant give them out to his friends

step-by-step explanation:

no friends = cant give anything out

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240