10 and -7 times each other equals -70.
10 plus -7 equals 3.
Hope this helps you! (:
Answer:
The new ramp must be 54 inches long than the old ramp to meet the requirement of the new law
Step-by-step explanation:
Old height to length ratio is:
h : l = 2 : 15.
Height of old ramp h = 12
Length of old ramp can be find out by putting h = 12 in the above ratio

Length of old ramp = 90
Height to length ratio by current law:
h : l = 1 : 12
Height will be the same i.e. h = 12

Length of new ramp = 144
How much longer the new ramp should be to meet the new ratio law:
New length - Old length = 144 - 90 = 54 inches
Answer:
First Screen:
1 & 3
Second Screen::A
Step-by-step explanation:
HOPE THIS HELPS!!