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3 years ago

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Which system of equations is represented by the graph ? a) y= 7x +1 & y= -x + 1 b)2x + 3 & y= -3x c) y= x + 13 & y=

-3x or d) y=2x+3 & y= - 3x + 13

1 answer:

igomit [66]3 years ago

7 0

The answer is obvious its the answer to anything else 42<span />

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Please i need help don't understand this problem.Trina and jessie went on vacation. Trina went scuba diving and reached an eleva

alexira [117]

I will explain this answer with the help of number line which i have shown below.

Considering sea level as starting point i.e origin i will depict how far Trina had gone below sea level and how much Jessie went above sea level.

Distance Traveled by Trina below sea level = - 85.5 meter

Distance Traveled by Jessie above sea level =87.9 meter

Considering sea level as origin i.e 0

Total distance traveled by Trina= 0-(-85.5)=85.5 meter

Total distance Traveled by Jessie = 0+87.9=87.9 meter

So,Trina is nearer to sea level than Jessie.

Now Trina wants to hang glide at the same number of meters above sea level as she scuba dived below sea level.

Then Distance traveled by Trina=85.5 meter

No,she will not fly higher than Jessie because Jessie has traveled 87.9 meter.

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3 years ago

A researcher collects demographic data on the marital status of the study subjects. The variable is measured as the number of ye

Ivan

Answer:

Probably "Median"

The mode doesn't really make sense,

and "mean" would probably be skewed by people who get divorced quickly

I would suggest "Median" the number of years that 1/2 of the couples are above and 1/2 below

Step-by-step explanation:

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3 years ago

Find dy/dx and d2y/dx2. x = cos(2t), y = cos(t), 0 < t < π

pogonyaev

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{\frac{\mathrm dy}{\mathrm dt}}{\frac{\mathrm dx}{\mathrm dt}}$

$y=\cos t\implies\dfrac{\mathrm dy}{\mathrm dt}=-\sin t$
$x=\cos2t\implies\dfrac{\mathrm dx}{\mathrm dt}=-2\sin2t=-4\sin t\cos t$
$\implies\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{-\sin t}{-4\sin t\cos t}=\dfrac14\sec t$

Let $z=\dfrac{\mathrm dy}{\mathrm dx}$ . Then

$\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\mathrm dz}{\mathrm dx}=\dfrac{\mathrm dz}{\mathrm dt}\dfrac{\mathrm dt}{\mathrm dx}=\dfrac{\frac{\mathrm dz}{\mathrm dt}}{\frac{\mathrm dx}{\mathrm dt}}$
$\implies\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\frac{\mathrm d}{\mathrm dt}\left[\frac14\sec t\right]}{-4\sin t\cos t}=\dfrac{\frac14\sec t\tan t}{-4\sin t\cos t}=-\dfrac1{16}\sec^3t$

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4 years ago

Veronica has received a $3,000 gift and is looking for a bank to start a savings account. Which option would be the best for her

Anarel [89]

Answer:

B Is your answer

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3 years ago

Read 2 more answers

I was just wondering this is one of my questions in my math books and i needed help

just olya [345]

Answer:

B is true

Step-by-step explanation:

5 is a coefficient of x^0

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3 years ago