x=7-2t
Move 7 to the other side. Sign changes from +7 to -7.
x-7=7-7-2t
x-7=-2t
Divide by -2 for both sides
x/-2-7/-2=-2t/-2
x/2+7/2=t
Answer: t= x/2+7/2 or t=7/2+x/2
Answer is A 15$=1 hour
30$=2 hours
45$=3 hours and so on
The first thing you should know is that you have two points in the space:
a (2, 0, -1)
b (2, 2, 3)
To form the ab vector we have:
ab = b - a = (2, 2, 3) - (2, 0, -1)
ab = (0, 2, 4)
Or equivalently:
ab = 0i + 2j + 4k
answer:
a vector with a representation given by the directed line segment ab is
ab = 0i + 2j + 4k
So you want to know how much 112 boxes weigh, given that 2 boxes weigh 3 oz. How many 2 box sets are in 112 boxes? 112/2 = 56 sets of 3 oz.each. 3 x 56 =168 oz. What is that in lbs? 168 oz. x 1lb/16 oz = 168 lb/16 = 10.5 lb.
