Answer:
1/6
Step-by-step explanation:
20 sec of 120 sec = 20/120 = 1/6
6d -11/2 = 2d -13/2
Subtract 2d from both sides
6d -11/2 - 2d = 2d -13/2 - 2d
Simplifying
4d -11/2 = -13/2
Add 11/2 to both sides
4d -11/2 + 11/2 = -13/2 + 11/2
Simplifying
4d = -2/2
4d = -1
Divide both sides by 4
4d/4 = -1/4
Simplifying
d = - 1/4
Answer:
45 feet
Step-by-step explanation:
Use ratios:

x = 540 inches
divide by 12 to get 45 feet
we are given

we can use factoring formula

we can compare
and we get


now, we can solve for m and n
and we get

now, we can use formula
and we get

now, we can set it equal to 0





so, we will get
.............Answer