Can someone help with question 51 please I need to break it down

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Answer 1

Answer: $(2)/(3)t-3\leq1|\cdot3\n2t-9\leq3\n2t\leq12\nt\leq6\n\n(3)/(4)t-2>7|\cdot4\n3t-8>28\n3t>36\nt>12\n\nt\leq6 \vee t>12\n\boxed{t\in(-\infty,6]\cup(12,\infty)}$

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Help please thanks!
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I need some help in this problem... -2/3x=-468/17
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Timmy uses 1 1/2 cups of sugar for every 2 gallons of lemonade he makes. How many cups of sugar would Timmy use if he makes 13 gallons of lemonade?cups of sugar

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Answer:

he would have to use 19.5 cups of sugar.

Step-by-step explanation:

An elevator moving down passes its neighbor, an elevator moving up. Their speed relative to one another is 8 m/s. What is the velocity of each elevator relative to someone standing on the first floor? Assume that the elevators are traveling at the same speed, and that the upward direction is positive.

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If they appear to be travelling at 8 m/s as viewed by one of them, then someone on ground floor sees what is actually happening. One is going up at 4 m/s and the other is going down at 4 m/s.

The direction matters. The answer is C.

LiftA= u m/s ( upwards)
LiftB= -u m/s(downward)

Velocity A relative to B= V lift A- V lift B=8m/s
u-(-u)=8
u=4m/s
Lift A= 4 m/sec
Lift B= -4m/sec
For someone standing on first floor will be stationary W.r.t to the lift.
V lift A relative to Man= V liftA - V man= 4m/s

V lift B relative to Man= V lift B- V Man= -4 m/s

Magda sold her car for $1,900. This was $300 less than twice the original purchase price. What was the original price of Magda's car? Let p represent the original price of the car.A .2p - 300 = 1,900; p = 1,100
B .300p = 1,900 + 2; p = 634
C .300 - 2p = 1,900; p = 800
D .2p = 1,900 - 300; p = 800