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3 years ago

9

Solve for t. -5 − 2t = 3t

2 answers:

Tom [10]3 years ago

7 0

First, we have to isolate the t, or keep it by itself, to solve. To do that, we need to move everything with t in it to on side.

-5 - 2t + 2t = 3t + 2t

The -2t and + 2t cross out, leaving us with t on one side, which is exactly what we want!

-5 = 5t

But t isn't alone yet. We need to get rid of its five. To do that, we need to use the same process: use the opposite symbol. In 5t, 5 is being multiplied by t. To get rid of, we need to divide 5. BUT the mega rule in algebra... what you do to one side you must do to the other, or else the equation would not be true anymore, so...

-5/5 = 5t/5

-1 = t

There's your answer! Hope this helps!

allsm [11]3 years ago

4 0

T is equal to -1.

<em>Add 2t to both sides of the equation.</em> -5 = 5t
<em>Divide both sides of the equation by -5.</em> 1 = -t
<em>Multiply both sides of the equation by -1.</em> -1 = t

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<u>Answer-</u>

$\boxed{\boxed{y=9000(1.0592)^x}}$

<em>And cost of a car in the year 2000 will be </em><em>$20134.18</em>

<u>Solution-</u>

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y = average cost of sedan in dollar

The exponential model that will model the scenario will be in the form of,

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where a and b are constants

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So, the points (0, 9000) and (5, 12000) will satisfy or lie on the exponential curve.

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Therefore, cost of a car in the year 2000 will be $20134.18

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