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3 years ago

Please help me need help ASAP thanks

Mathematics

1 answer:

inysia [295]3 years ago

3 0

Answer:

Company B would be a better choice.

Company B is cheaper.

Step-by-step explanation:

Let x be the rate per square foot

✔️Company A charges: $215 + $0.50x

If they are installing 400 ft² of carpet, they would be charged the following by company A,

Substitute x = 400 into the equation.

We have:

$215 + $0.50(400) = $415

They would pay $415 if they use Company A's services

✔️Company B charges: $100 + $0.75x

If they are installing 400 ft² of carpet, they would be charged the following by company B,

Substitute x = 400 into the equation.

We have:

$100 + $0.75(400) = $400

They would pay $400 if they use Company B's services .

✅Company B would be a better choice because the total charges they would pay to install 400 ft² carpet is cheaper than they would pay for Company A.

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Two kids are roller skating. Amy, with a mass of 55 kg, is traveling forward at 3 m/s. Jenny, who

alekssr [168]

Answer:

They traveling at $0.37\ m/s$ in backward direction.

Step-by-step explanation:

Given mass of Ammy $m_1=55kg$

and velocity is forward at $v_1=3m/s$

Also, mass of Jenny $m_2=40kg$

Who is travelling in opposite direction $v_2=-5m/s$

Let velocity in forward direction is positive and velocity in backward direction is negative.

Also, velocity after crash is $v$

As they crashed into each other and they moved as one mass. We can apply principle of conservation of momentum.

Conservation of momentum says momentum before collision should equal to momentum after collision.

$m_1v_1+m_2v_2=(m_1+m_2)v$

$(55\times3)+(40\times(-5))=(55+40)v\\\\165-200=95v\\\\-35=95v\\\\v=\frac{-35}{95}=-0.368m/s$

So, velocity after collision $v$ ≅ $-0.37m/s$ is in opposite direction. That is the direction of Jenny.

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3 years ago

Lisa typed a 165-word paragraph in three minutes. Use the ratio table to

JulsSmile [24]

Answer:

1 minute

Step-by-step explanation:

We can see that Lisa types 165 words in 3 mins.

So she types 55 words in 1 minute.

How did I work that out?

Well, all you really do is $\frac {165}{3}$ which is equal to $\frac{55}{1}$ if you divide top and bottom by 3. Anything divided by 1 is itself.

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2 years ago

Find the measure of angle K.

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Answer:

m∠K = 97°

Step-by-step explanation:

The sum of the measures of the angles of a quadrilateral is 360

127 + 5x + 3 + 10x + 7 + 88 = 360

15x + 225 = 360

15x = 135

x = 9

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago