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3 years ago

Will GiVE BRAINLIEST!!!!

Mathematics

1 answer:

Usimov [2.4K]3 years ago

7 0

Answer

Step-by-step explanation:

To find the x value, you want to cancel out the y terms in the equations. To do so, multiply (2x+5y=6) by 2, and (-x+2y=-3) by -5. This gives you

4x+10y=12

5x-10y=15

You can then cancel out the y terms and add the other terms from the 2 equations together to make

9x=27

You then divide 27 by 9 to get 3 as the value for x.

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What is the answer to<br> 1. b+4=2b-5<br> 2. -6-29=5x-7<br> 3. 10h+12=8h+4<br> 4. 7a-17=4a+1

RoseWind [281]

Answer:

b=9

(assuming you meant -6x) x = -2

h = -4

a = 6

Step-by-step explanation:

6 0

3 years ago

Please help - ACT math practice test

bezimeni [28]

Answer:

Step-by-step explanation:

Let's look at the equation.

$h=-at^{2}+bt+c$

This is a standard negative polynomial equation.

So changing the c value will basically move the graph up/down.

$I$ is true because if it moved up or down, the h-intercept would change.

$II$ is true because if it moved up or down, the maximum would change.

$III$ is true because if it moved up or down, the t-intercept would be moved left or right.

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3 years ago

Find y' if x = tan(y)

Travka [436]

Use the chain rule:

$x=\tan y$
$\dfrac{\mathrm d}{\mathrm dx}x=\dfrac{\mathrm d}{\mathrm dx}\tan y$
$1=\sec^2y\dfrac{\mathrm dy}{\mathrm dx}$
$1=\sec^2y\,y'$
$y'=\dfrac1{\sec^2y}=\cos^2y$

Furthermore, if you restrict the domain of $y$ , we could write

$x=\tan y\iff \tan^{-1}x=y$

and so we could also have

$y'=\cos^2(\tan^{-1}x)=\left(\dfrac1{\sqrt{x^2+1}}\right)^2=\dfrac1{x^2+1}$

5 0

4 years ago

Matt claims that the decimal 6.25 is equivalent to the fraction 25/4. Explain how that's incorrect.

sdas [7]

Actually, that is a trick question. Matt is correct because 24/4 is equal to 6. 1/4 is equal to 0.25. Add them together and you get 6.25. I just split 25/4 into 24/4 and 1/4 if you didn't understand what I did.

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4 years ago

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The two lines below are parallel. If the slope of the red line is 1/5 what is the slope of the green line?

alisha [4.7K]

Its 1/5.

Parallel lines have the same slope.

Hope this helps.

3 0

3 years ago

Read 2 more answers