Answer:
x=5, y=1
Step-by-step explanation:
Solve for the first variable in one of the equations, then substitute the result into the other equation.
x-4=-x+6
2x=10
10/2=5
x=5
Now put X(5) into the other equation.
y=5-4
y=1
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Answer:
12 + 24 = 2(6 + 12)
Step-by-step explanation:
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Answer:
1 hour
Step-by-step explanation:
let the pipe take x hours to fill a house
then the second pipe will take=(x+2) hours
the combined time to fill up the house is 3 hours
so
1/(x+2)+1/2=1/3-----this is the combined work rate for both pipes
the lcm is 2(x+2)
(2+x+2)/2(x+2)=1/3
x+4/2(x+2)=3
cross multiply we have
x+4=3(x+2)
x+4=3x+6
3x+6-x-4=0
3x-x+6-4=0
2x+2=0
2x=-2
x=-1
The time is 1 hour
Answer:
The answer is 13
Step-by-step explanation:
You'll say what will you multiply by itself to give you 169.
It will be 13 times itself and it will be =169.