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4 years ago

Solve the equation 18x - 9 = 5+ 12x

Mathematics

1 answer:

Hitman42 [59]4 years ago

8 0

Answer:

$x = 2\frac{1}{3}$

Step-by-step explanation:

Try to get x alone on one side

Add nine to both sides

18x - 9 = 5 + 12x

+ 9 + 9

Subtract 12x from both sides

18x = 14 + 12x

-12x -12x

Now that you have x alone on one side divide both sides by 6

6x = 14

$\frac{6x}{6} = \frac{14}{6}$

$x = 2 \frac{2}{6} or 2 \frac{1}{3}$

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4 years ago

The function y = -16x2 + 1500 gives a parachute jumper's height y in feet

earnstyle [38]

Answer:

Step-by-step explanation:

so the question is asking about the time from 1500 feet to 1100 feet. How long did they fall, w/o a parachute. aka "freefall" so, at 1500 feet the jumper is really at time zero. so, plug in to the formula

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( x represents seconds so i'll change it to t so we know it's time )

1100 = -16 $t^{2}$ + 1500

now we can solve for t , to see how long the jumper falls

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25 = $t^{2}$ ( dividing both sides by -16 )

oh.. look at how nice that turns out.. :)

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3 years ago

The price of a pack of kitchen rolls is reduced by 1/6

sweet-ann [11.9K]

Answer: 1.44

Step-by-step explanation:

(original price) - (1/6 of the original price) = 1.20

If you let x = original price, then the equation is:

x - 1/6 x = 1.20

5/6 x = 1.20

x = 1.44

the original price is £1.44.

Credits to the person who also answered :)

I hope this helps!

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2 years ago

Read 2 more answers