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Maru [420]
3 years ago
12

A new car worth $21,000 is depreciating in value by $3,000 per year. Complete parts (a) through (c) below. a. Write a formula th

at models the car's value, y, in dollars, after x years. y=
Mathematics
1 answer:
IRINA_888 [86]3 years ago
3 0

Answer:

Step-by-step explanation:

If the car's value is going down by 3000 a year, this is a linear function.  Most depreciation is exponential, but no matter.  The steady falling indicates linear.  And the steady rate that it is falling, 3000, is the slope of the line.  You could look at it in terms of 2 coordinate points.  (0, 21000) is one point, where x is the time gone by and y is the value of the car.  This point tells us that when 0 time has gone by, the car is brand new, worth 21000.  Another point could be (1, 18000), where after 1 year, the cars value is 18000.  Using those in the slope formula will give you the slope of the line.

m=\frac{18000-21000}{1-0}=-3000

Now use that slope along with either one of the coordinates to write the equation of the line.  I am going to use (0, 21000) to get

y - 21000 = -3000(x - 0) and

y - 21000 = -3000x + 0 and

y = -3000x + 21000

That is the linear function that models that particular situation.  I do not see a part b and c, so maybe this equation can help you with those parts.

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The area of a rectangular piece of paper is 32 square inches. The perimeter is 24 inches.
rodikova [14]

Answer

4 and 8

Explanation

List all factors of 32 and then find which number equals 24 when added

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5 0
2 years ago
Find the exact value of tan 13Π/8 using half-angle identities.
Whitepunk [10]
I hope this helps you



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6 0
3 years ago
In a bakery, a bag of bread rolls cost x dollars. A loaf of multi-grain bread costs $2 more than a bag of bread rolls. Mr. Lopez
Vaselesa [24]

Step-by-step explanation:

Cost of bag of bread rolls is x

Multigrain is (+2) more.

So (x+2)

Y can be the number of multigrain loves Mr. Lopez buys.

Answer: y=50/(x+2)

6 0
3 years ago
Karen drives straight south on Interstate 405 from the Santa Monica Freeway interchange going 10 miles per hour faster than Meli
natima [27]

Karen is moving at 81.2 miles per hour while Melinda is moving at 71.2 miles per hour.

<h3>Equation for speed</h3>

Speed is the ratio of total distance travelled to total time taken. It is given by:

Speed = distance / time

Let a represent Karen speed and b represent Melinda speed, hence:

a = b + 10

a - b = 10   (1)

Also:

a = d₁ / 1

d₁ = a

b = d₂/ 1 hour

d₂ = b

Since they are 108 miles apart, using Pythagoras:

108² = d₁² + d₂²

a² + b² = 11664

(b + 10)² + b² = 11664

b = 71.2 mph, a = 81.2 mph

Karen is moving at 81.2 miles per hour while Melinda is moving at 71.2 miles per hour.

Find out more on speed at: brainly.com/question/4931057

5 0
2 years ago
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nadezda [96]

Answer:

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