2 years ago

Which expressions are equivalent to (13x+x−53x)−(−43x+2) ?

Mathematics

1 answer:

RoseWind [281]2 years ago

5 0

Answer:

4x+2

Step-by-step explanation:

(13x+x−53x)−(−43x+2)

Group all the same variables on each side.

(-39x)-(-43x+2)

-39x+43x+2

4x+2

Hope this helps :)

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3x+2y=23 1/2x-4=y What should I do for this one...? I dont really understand

Hitman42 [59]

Since you have y alone on one side of the equation......

Use substitution and plug in 1/2x-4 for y in the other equation.

$3x+2(1/2x-4)=23\\$

Distribute

$3x+x-8=23$

Combine like terms

$4x-8=23$

Add 8 to both sides

$4x=31$

Divide by 4

and $x=31/4$

Plug this value in for x

$31/4*1/2-4=y$

Simplify

$31/8-4=y$

Multiply everything by 8 and simplify

$31-32=8y\\-1=8y$

Divide.....

$y=-1/8$

Your answers are:

$y=-1/8\\x=31/4$

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3 years ago

There are 3000 people at a concert you survey a random sample of 200 people and find that for 35 of them this is their first con

Ipatiy [6.2K]

Ok so
ratio
35/200=x/3000
7/40=x/3000
multiply both sides by 12000
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525=x

aprox 525 people

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3 years ago

I'm stuck on graphing this quadratic equation: <img src="https://tex.z-dn.net/?f=y%20%5Cleqslant%20%20%7Bx%7D%5E%7B2%7D%20%20

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Write an equation for the nth term of the geometric sequence 6000,3000,1500,750 PLEASE HELP!!!

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i hope this helps! :D

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2 years ago