Just multiply top by top and bottom by bottom
first simplify them as much as possible for ease
20/25=5/5 times 4/5=1 times 4/5=4/5
5=5/1
5 times 4/5=5/1 times 4/5=(5*4)/(1*5)=20/5=5/5 times 4/1=1 times 4/1=4
Answer:
Step-by-step explanation:
b x .15 = 5.10
b=5.10/.15
b=34
Answer:
(-6,8)
Step-by-step explanation:
2x + 9y = 60
-9x + y = 62 --> y = 9x + 62 --> 2x + 9(9x + 62) = 60 -->
2x+ 81x + 558 = 60 -->
83x + 558 = 60 -->
83x = -498 -->
x = -6 -->
y = 9(-6) + 62 -->
y = 8
Answer:
The answer to the question is
1.5 hours that is;
When the distance between them is more then 135 miles is after 1.5 hours and they will lose radio contact at 3:30 p.m.
Step-by-step explanation:
We note that
The speed of the military convoy headed north =50 mph
The speed of the convoy headed south = 40 mph
Let t be the time taken for the two convoys to be 135 miles apart
The time taken for the two convoys to be 135 miles apart is given by
50×t miles+ 40×t miles= 135 miles
That is 90×t miles = 135 miles
t = 135/90 = 1.5 hrs
