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3 years ago

A car approaches a stop sign going 10 m/s before coming to a stop. If it takes 5 seconds to

Mathematics

1 answer:

Levart [38]3 years ago

4 0

Answer:

The acceleration is: a = -2 m/s²

The negative sign indicates that velocity is decreasing with time.

Step-by-step explanation:

Given

Initial velocity u = 10 m/s

Final velocity v = 0

Time taken t = 5 seconds

To determine

Acceleration a = ?

Using the formula to determine the acceleration

a = (v - u) / t

substituting u = 10 m/s, v = 0 and t = 5

a = (0 - 10) / 5

a = -10 / 5

a = -2 m/s²

Thus,

The acceleration is: a = -2 m/s²

The negative sign indicates that velocity is decreasing with time.

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M is the midpoint of QR<br><br> M = (-2,6)<br> Q= (8,-10)<br> R = ????

Zolol [24]

Answer:

R = (-12, 22)

Step-by-step explanation:

Unfortunately it's not a straight line, so gonna need to put in some extra work. Basically think of it like breaking it into it's horizontal and vertical components then doubling them.

From Q to M you move 10 spaces to the left, so to go from M to R you will go another 10 to the left. Similarly, you start at -10 for the y value and go up 16 to 6, and you will need to go up another 16 to get to R.

So for x, 8 -10 = -2 then -2 - 10 = -12, so R's x value is -12

y we do the same thing. Gonna do it in one step though. -10 + 16 + 16 = 22

So R is (-12, 22)

4 0

3 years ago

Y is directly proportional to x, and y=56 when x=7. find the value of y when x=4.

podryga [215]

Y=kx
when y=56, x=7
56=7k
k=8
when x=4
y=8(4)
y=32
value of y=32

6 0

3 years ago

Elsa pumped 12 gallons of water into her pool. This was done over a period of 2 minutes at a constant rate. What was the change

Rashid [163]

Answer:

it was 6 because do 12 / 2 will equal 6.

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3 years ago

According to a report, 67.5% of murders are committed with a firearm. (a) If 200 murders are randomly selected, how many wou

kolezko [41]

Answer: The answer is 135 murders.

Step-by-step explanation: The report tells us that statistically 67.5% of murders are committed using a firearm. It follows therefore that in a sample of 200 randomly selected murders, one would expect that 67.5% of those would be by a firearm. $\frac{67.5}{100}$ * 200 = 135.

It would certainly be higher that the expected value based on previous data collected but it would not be unusual because one sample may have a higher than "normal" amount of murders by firearm. Statistics aren't going to be exact for every sample.

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3 years ago

Danielle plotted 3 points from the equation y = 4x on this coordinate grid. She drew a straight line through the points. Which o

Evgen [1.6K]

3... y= 4x means 3x4=12

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3 years ago

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