Answer:
x=3, y=0.8
Step-by-step explanation:
8x+5y=28
4x+5y=16
Subtract the second simultaneous equation from the first.
You are left with: 4x=12
12/4=3
x=3
Substitute this back into one of the equations.
8(3)+5y=28
8*3=24
28-24=4
4=5y
4/5=0.8
y=0.8
Answer:
117 cookies
Step-by-step explanation:
Using a ratio
52 cookies x cookies
-------------- = --------------
4 scoops 9 scoops
Using cross products
52*9 = 4x
Divide each side by 4
52*9/4 =x
117 cookies
Answer:
It would take 25 minutes for Patrick to complete the project alone.
Step-by-step explanation:
They did the project in 20 minutes, that is, 100% of the project, so:
In which x is the percentage that Patrick worked and y is the percentage that Stewart worked.
Patrick works four times as quickly as Stewart, so x = 4y.
So
-----------
Patrick did 80% of the project in 20 minutes. We can solve this problem by a simple rule of three, in which the time it would take for him to complete the project alone is 100%. So
20 minutes - 0.8
x minutes - 1
It would take 25 minutes for Patrick to complete the project alone.
From the information you gave
A = by
b = 8
h = 4
A = (8)y
A = 8y is your answer
hope this helps
The questions asking here is basically asking for half of the hypotenuse
Pythagorean Theorem= a^2 + b^2 = c^2
40^2 + 30^2 = c^2
1600 + 900 = c^2
2500 = c^2
square root of 2500 is 50
C = 50
half of C is 25
BE is 25