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3 years ago

Please help me I can't get anyone to answer my question.

Mathematics

1 answer:

Gnoma [55]3 years ago

7 0

Answer:

(-1.5, 9) midpoint of AB

Step-by-step explanation:

The midpoint of A"B" is ...

M" = (A" +B")/2 = ((-3, 1) +(4, -9))/2 = (-3+4, 1-9)/2 = (1/2, -4)

We can "undo" the reflection across the x-axis to find M'. Reflecting M" back across the x-axis negates its y-coordinate:

M' = (1/2, 4)

We can undo the translation right 2 and down 5 by translating M' left 2 and up 5.

M = M' +(-2, 5) = (1/2-2, 4 +5)

M= (-1.5, 9)

The midpoint of AB is (-1.5, 9).

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A soccer player kicks a rock horizontally off a 31.0 m high cliff into a pool of water. If the player hears the sound of the spl

OLga [1]

Answer:

initial speed given to the rock is v= 147.46 m/s

Step-by-step explanation:

Since the player kicks the rock horizontally , then its initial vertical speed is always vy₀=0 and thus the time to hit the pool is independent of the speed given to the rock . t is calculated through

0 = y + vy₀*t - 1/2*g*t² = y+ 0 - 1/2*g*t²

then

t = √(2*y/g) = √(2*31 m/ 9.8 m/s²) = 2.515 s

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D= v sound * T

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then

D= v sound * T = 343 m/s* 1.085 s = 372.155 m

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D= √(x² + y²)

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3 years ago

Emily Runs 10 ft./s Jake runs 334 feet and 26 seconds Katie runs 1 mile in 596 seconds and Stephanie runs 580 feet in one minute

shutvik [7]

Jake runs fastest

Step-by-step explanation:

The given is:

Emily Runs 10 ft./s
Jake runs 334 feet in 26 seconds
Katie runs 1 mile in 596 seconds
Stephanie runs 580 feet in one minute

We need to find who runs fastest

To solve the problem we must to find the unit rate of each one in feet per second

∵ Jake runs 334 feet and 26 seconds

- To find the unite rate divide 334 feet by 26 seconds

∴ Jake's rate = 334 ÷ 26 = 12.85 ft./s

∵ Katie runs 1 mile in 596 seconds

- Change the mile to feet

∵ 1 mile = 5280 feet

∴ Katie runs 5280 feet in 596 seconds

- To find the unite rate divide 5280 feet by 596 seconds

∴ Katie's rate = 5280 ÷ 596 = 8.86 ft./s

∵ Stephanie runs 580 feet in one minute

- Change the minute to seconds

∵ 1 minute = 60 second

∴ Stephanie runs 580 feet in 60 seconds

- To find the unite rate divide 580 feet by 60 seconds

∴ Stephanie's rate = 580 ÷ 60 = 9.67 ft./s

∵ Emily's rate is 10 ft./s

∵ Jake's rate is 12.85 ft./s

∵ Katie's rate is 8.86 ft./s

∵ Stephanie's rate is 9.67 ft./s

- The fastest one who has the greatest rate

∵ Jake's rate is the greatest

∴ Jake runs the fastest

Jake runs fastest

Learn more:

You can learn more about the word problems in brainly.com/question/1634276

#LearnwithBrainly

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