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.
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
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Michael has negative 135 dollars in his account.
Answer:
The answer is -135
Step-by-step explanation:
We can do 160 times 3 which is 480 for the 3 times he withdrew $160 from his total. (Withdraw means taking, so subtraction).
Then, we do 480 minus 354 which is -135.
Answers
Factor by grouping: 6x2 + 3x + 20x + 10.
This is a polynomial written with four terms that don't have a single common factor among them. However, the first two terms have a common factor (3x), and the last two terms have a common factor (10). This situation doesn't answer all of our wildest factoring dreams, but we'll take it.
By pulling out the common factors for each pair of terms, we can rewrite the original polynomial like this:
3x(2x + 1) + 10(2x + 1)
These two terms now have a common factor of (2x + 1). Seems like we should be able to do something with that information, don't you think? In fact, we can pull out this common factor and rewrite the polynomial again:
(3x + 10)(2x + 1)
Step 1: Determine the greatest common factor of the given terms. The greatest common factor or GCF is the largest factor that all terms have in common.
Step 2: Factor out (or divide out) the greatest common factor from each term.
Step 1: Determine the greatest common factor of the given terms. The greatest common factor or GCF is the largest factor that all terms have in common.
Step 2: Factor out (or divide out) the greatest common factor from each term.
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y( 3y - 4)
Greatest common factor: y
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Answer: The X axis.
Step-by-step explanation: You can tell because if you fold the paper in half hamburger style then the two shapes line up and they fold across the X axis.
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Answer:
wheres A though? Try to provide a picture or something.
Answers
Answer:
.
Step-by-step explanation:
We want to find the value of .
Note that;
This implies that;
Also 270 degrees is a quadrantal angle.
On the unit circle, is the x-coordinate of the point
Hence, .
Answer:
B.
Step-by-step explanation:
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