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3 years ago

1) reflect the point (7,9) across the x-axis

Mathematics

1 answer:

anzhelika [568]3 years ago

4 0

1) (7,-9)
2) (-7,9)

Hope this helps! :)

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The waiting time to ride a roller coaster is 20 minutes when 150 people are in line. How long is the waiting time when 240 peopl

laiz [17]

Answer: The waiting time will be 32 minutes when 240 people in line.

Step-by-step explanation:

Let us assume that the waiting time is directly proportional to the number of people in the queue.

Equation of direct proportion between variables x and y : $\dfrac{x_1}{y_1}=\dfrac{x_2}{y_2}$

Put $x_1=20,\ y_1=150,\ y_2=150$ to find $x_2$ .

$\dfrac{20}{150}=\dfrac{x_2}{240}\\\\\Rightarrow\ x_2=\dfrac{20}{150}\times240\\\\\Rightarrow\ x_2=32$

Hence, the waiting time will be 32 minutes when 240 people in line.

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3 years ago

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Deffense [45]

does it say how much boxes she gave her sister?

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3 years ago

A rectangle has length (3x-8) and width (2x-7) cm .Write down and simplify an expression for the perimeter of the rectangle. So

tatuchka [14]

Answer:

The perimeter of the rectangle is equal to $(10x-30)\ cm$

Step-by-step explanation:

Let

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W ----> the width of the rectangle

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substitute

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4 years ago

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dmitriy555 [2]

Answer:

the third one is the one having the highest y - intercept.

reason ; the equation is of the form y = x +c

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the first one will give c = -8

the second will give c = -1

and the third will give c = 6

Step-by-step explanation:

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3 years ago