Bought a new car in 2011 for 25000. in 2015, joe was offered a fair price of 12000 for his car but he turned it down. build a linear algebraic model, that joe find the car's value when it is t years old

Step-by-step explanation:

we know that

The linear equation in slope intercept form is equal to

where

m is the slope of unit rate of the linear equation

b is the y-intercept or initial value of the linear equation

Let

t ----> the number of years since 2011

y --->the car's value

In this problem the year 2011 represent t=0

so

the year 2015, represent t=4 years (2015-2011)

we have the ordered pairs

(0,25,000) ----> represent the y-intercept

(4,12,000)

Find the slope m

The formula to calculate the slope between two points is equal to

substitute the values

---> is negative because is a decreasing function

we have

----> value of y when the value of x is equal to zero (initial value)

substitute the given values

y = -3250t + 25000

Explanation:

Assuming the years between 2011-2015 to be a straight line

We know that, for a straight line, y = mx + c,

Where, m is slope of unit rate

c is the y-intercept

Consider t to be the no. of years since 2011 and y to be the car’s value

So, for 2011, t=0

And for 2015, t=4 (2015-2011)

Finding the slope m

m =

m =

m = -  = -3250 per year (negative because it is a decreasing function)

We have, c = 25000

Substituting the values in the straight line equation,

y = -3250t + 25000

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.