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2 years ago

The chart indicates the time, speed, and velocity of five runners.

Mathematics

2 answers:

inessss [21]2 years ago

8 0

Answer: Velocity

Step-by-step explanation:

It is given that the chart indicates the time, speed, and velocity of five runners.

Velocity is a vector quantity which tells the rate of change of runner's position with respect to time in a given direction whereas speed has only magnitude but not direction.

Hence, the term which best describes the runners is Velocity.

Nuetrik [128]2 years ago

5 0

<span>Garreth and Elisa ran together, Luigi and Jasmine went the same distance, and Logan and Jasmine have the same displacement in the opposite direction. This is the answer which is C</span>

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A craftsman can sell 10 jewelry sets for $500 each. He knows

liraira [26]

Answer:15

Step-by-step explanation:

Given

Craftsman sell 10 Jewelry set for $500 each

For each additional set he will decrease the price by $ 25

Suppose he sells n set over 10 set

Earning $=\text{Price of each set}\times \text{no of set}$

Earning $=(500-25n)(10+n)$

$E=5000+500n-25n^2-250n$

differentiate to get the maximum value

$\frac{dE}{dn}=-50n+250$

Equate $\frac{dE}{dn}$ to get maximum value

$-50n+250=0$

$n=\frac{250}{50}$

$n=5$

Thus must sell 5 extra set to maximize its earnings.

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Veronica put a $400 necklace on layaway by making a 10% down payment

JulsSmile [24]

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2 years ago

Jo is on the phone with a gardener who asks about the square feet of Jo's backyard. Jo counts 20 steps long and 40 steps wide (w

Sever21 [200]

Hey there!

Each step is three feet. This can be represented by 3s= feet. We can plug that in to figure out our side lengths.

20(3)=60

40(3)=120

Now we can multiply these two together to get the area.

120(60)= 7,200

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2 years ago

Two people start walking at the same time in the same direction. One person walks at 8 mph and the other person walks at 2 mph.

schepotkina [342]

Time = distance/speed

The distance between the walkers increases at the rate of (8 mph) -(2 mph) = 6 mph. That distance will be 4.5 mi after ...
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In 3/4 hour they will be 4.5 miles apart.

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2 years ago

A man has 28 coins in his pocket, all of which are dimes and quarters. if the total value of his change is 520 cents, how many d

nordsb [41]

Assuming x = dimes, y = quarters

$x + y = 28 \\ 0.1x + 0.25y = 5.20$

$x + y = 28 \\ x = 28 - y$

Substitute that into,
$0.1(28 - y) + 0.25y = 5.20 \\ 2.8 - 0.1y + 0.25y = 5.20 \\0.15y = 2.4 \\ y = 16$

Answer : He has 16 quarters.

Hope this helps. - M

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2 years ago