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Free_Kalibri [48]
3 years ago
7

Christian purchased a new car. The value of the car is depreciating at a

Mathematics
1 answer:
LenKa [72]3 years ago
3 0

18000 represents the price of the new car.

The value of the car in 6 years can be found by substituting 6 for the variable t, as follows:

V = 18000(1-.12)^6\\V = 18000(0.4644)\\

In 6 years, it will be worth around $8359.27.

The equation for the car worth $20000 is this:

V = 20000(1-.15)^6\\V = 20000(0.3771)\\

In 6 years, the other car will be worth $7542.99, so the car worth $18000 will have more value in 6 years.

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If Rs 42,000 is left after paying an income tax at the rate of 30%.Find the income
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5 0
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its 76 degrees fahrenheit at the 6000-foot level of a mountain, and 49 degrees Fahrenheit at the 12000-foot level of the mountai
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T = \frac{-9}{2}x + 103 is the linear equation to find the temperature T at an elevation x on the mountain, where x is in thousands of feet.

<em><u>Solution:</u></em>

The linear equation in slope intercept form is given as:

T = cx + k ------ (i)

Where "t" is the temperature at an elevation x

And x is in thousands of feet

<em><u>Given that its 76 degrees fahrenheit at the 6000-foot level of a mountain</u></em>

Given, when c = 6 thousand ft and T = 76^{\circ} fahrenheit

This implies,

From (i)

76 = c(6) + k

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Given, when c = 12 thousand ft and T = 49^{\circ} fahrenheit

This implies,

From (i)

49 = c(12) + k

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49 = 12c + (76 - 6c)

49 = 12c + 76 - 6c

49 - 76 = 6c

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Substituting the value of c in (ii) we get

k = 76 - 6( \frac{-9}{2})\\\\k = 76 + 27 = 103

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T = \frac{-9}{2}x + 103

Where "x" is in thousands of feet

Thus the required linear equation is found

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