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grin007 [14]
2 years ago
14

Andre ran 2 kilometers in 15 minutes, and Jada ran 3 kilometers in 20 minutes. Both ran at a constant speed. Did they run at the

same speed?
Mathematics
1 answer:
Goshia [24]2 years ago
6 0

Answer:

speed of Jada = 6km per hour which is not equal to

speed of Andre = 8km per hour

They did not run at same speed

Step-by-step explanation:

formula of speed = distance covered/ time taken

For Andre

Distance = 2 KM

time = 15 mins

60 mins = 1 hour

15 mins = 1/60 * 15 hour = 0.25 hours

thus,

speed = 2km/0.25 hour = 8 km per hour

Similarly for Jada

Distance = 3 KM

time = 20 mins

60 mins = 1 hour

20 mins = 1/60 * 20 hour = 1/3 hours

thus,

speed = 2km/(1/3)hour = 6  km per hour

Now we have

speed of Jada = 6km per hour which is not equal to

speed of Andre = 8km per hour

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Sylvia has a piece of material that is 668.36 square inches. She marked the material into 4 equal pieces and then cut out one of
sveta [45]

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Sylvia came along and marked it into 4 equal amounts, so each
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The same process works for length, volume, area, stones, money, anything.
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How does the exponent of each power of ten correspond with placing a decimal
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3 0
2 years ago
Which transformations have been applied to the graph of f(x) = x2 to produce the graph of g(x) = –5x2 + 100x – 450? Select three
RSB [31]

Answer:

The graph of f(x) is shifted up 50 units

The graph of f(x) is shifted right 10 units

The graph of f(x) is reflected over the x-axis

Step-by-step explanation:

we have

f(x)=x^{2}

This is a vertical parabola open upward

The vertex is a minimum

The vertex is the origin (0,0)

g(x)=-5x^{2}+100x-450

This is a vertical parabola open downward

The vertex is a maximum

The first thing to note is that fx) is a parabola that opens up and g(x) opens down, so a reflection across the x-axis must have been applied.

Find the vertex of g(x)

Convert to vertex form

g(x)=-5x^{2}+100x-450

Complete the square

g(x)=-5(x^{2}-20x)-450

g(x)=-5(x^{2}-20x+100)-450+500

g(x)=-5(x^{2}-20x+100)+50

g(x)=-5(x-10)^{2}+50

The vertex is the point (10,50)

so

To translate the vertex of (0,0) to (10,50)

The rule of the translation is

(x,y) ------> (x+10,y+50)

That means ----> The translation is 10 units at right and 50 units up

therefore

The transformations are

The graph of f(x) is shifted up 50 units

The graph of f(x) is shifted right 10 units

The graph of f(x) is reflected over the x-axis

5 0
2 years ago
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vivado [14]

Anthony ran 5.5 miles each day after school

Let x represent the amount of mile he covered at the park after school. Since he ran 1.5 miles each day before school, the total distance covered each day is:

Total distance covered each day = Distance ran before school + Distance ran after school

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Since he ran for 4 days in a week, hence:

Total distance ran in a week = 4 days × (1.5 + x)

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But at the end of the week he ran 28 miles, hence:

4x + 6 = 28

4x = 22

x = 5.5 miles

Hence Anthony ran 5.5 miles each day after school

Find out more at: brainly.com/question/23729577

4 0
2 years ago
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