Easy! 1 hour - 1 hour and 30 minutes = 30 minutes(together)
Answer:
3 each
Step-by-step explanation:
60 divided by 20
We are given equations as

Firstly, we will write in slope intercept form of line
y=mx+b

Subtract both sides by 4x


now, we can divide both sides by a

we can find slope
so, we get

we are given second equation as

Firstly, we will write in slope intercept form of line
y=mx+b
divide both sides by a

we can find slope

we are given both lines are perpendicular
so, the multiplication of their slopes must be -1

we can plug values

now, we can solve for a

Multiply both sides by a


now, we can solve for a
we get
...............Answer
F=182/.8 should be the correct equation to use in this problem since your trying to find the remaining 80% left of the floor