Ok here are the problems I need help with
1)A revenue of $1500 is obtained from the sales of item A at $50 each and item B at $25 each. Write an equation that shows the relationship between the numbers of items sold.
2)An airplane trip is traveling away from its home airport at a constant speed. After 3 hours, it is 540 miles away Assuming it departed at t=0, write an equation representing the distance, “D” (in miles), at any time “t” (in hours).
3)A real estate sales agent receives a salary of $250 per week plus a commission of 2% sales. Write a linear model for the weekly income “y” in terms of sales “x”.
4)Machinery is bought new for $36,000 and is considered worth $2,000 as junk at the end of 10 years. Assuming a linear model for depreciation, write the equation of its value, “V” (in dollars), when “t” years have elapsed after the purchase.
Please label your answers with a number to represent the question you are answering. Please explain the answer too.
wow, this is long. You want someone to do your homework or something? You should do your own homework. Otherwise, you won’t be able to learn.
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OK
1) Let no of itemA = a
Let no of itemB = b
Then 50a + 50b = 1500
2) D = s x t
So 540 = s x 3
3) y = 250 + 2% of x
4) DEP for 1 year = (36000-2000)/10
= 3400
So V =36000 – (3400 x t )
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1. 50A + 25B = 1500, where A is the number of items type A sold, and B is the number of items type B sold.
2. d=distance, t=time, s=speed
d=st (distance equals rate (speed) times time)
3. y = 250 + 0.02x, where x is the dollar value of sales made and y is total income
4. V = 36 – 3.4t, where V is the value in thousands of dollars.
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