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stepan [7]
4 years ago
11

The price of apples went from $1.99 per lb to $3.19 per lb in four years. Find the rate of change of the price of apples.

Mathematics
2 answers:
Aneli [31]4 years ago
7 0
The answer is A. add $0.30 to $1.99 four times and it comes out to $3.19. by adding .50, the total after four years comes to $3.99. add .80 four times, $5.19. add $1.10 four times and it comes to $6.39. you can also multiply the answer choices by 4 and then add $1.99 to get the same thing.
valentinak56 [21]4 years ago
6 0

Answer:

Option A is correct

$0.30 per lb per year

Step-by-step explanation:

As per the statement:

The price of apples went from $1.99 per lb to $3.19 per lb in four years.

rate of change in the price of apples in 4 years = $3.19-$1.99 = $1.2 per Ib

We have to find the rate of change of the price of apples per year.

In 4 years, rate of change in price  = $1.2 per Ib

then;

In 1 year, rate of change in price  = $0.3 per Ib

Therefore, $0.30 per lb per year is the rate of change of the price of apples.

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A delivery of 5 large boxes and 3 small boxes has a total mass of 137 kilograms. A delivery of 2 large boxes and 6 small boxes h
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Answer:

Large boxes are 18.25 kg

Small boxes are 15.25 kg

Step-by-step explanation:

This is a system of equations. You need to set up each equation first.

I am assigning x to be big boxes and y to be small boxes.

5x + 3y = 137

2x + 6y = 128

To solve, you will need to eliminate a variable. That means you will have to multiply one of the equations by a number to make it so a variable will be eliminated. I will be multiplying the top equation by -2.

-2 ( 5x + 3y = 137)

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Distribute the -2 to everything in the parentheses in the first equation.

-10x - 6y = -274

2x + 6y = 128

Notice the 6y will go away because -6y + 6y = 0. Now add the equations together. The remaining equation is:

-8x = -146

Solve for x by dividing by -8.

x = 18.25

Now plug that into one of the original equations.

2(18.25) + 6y = 128.

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-36.5            -36.5

6y = 91.5                          Divide by 6 to solve

y = 15.25

7 0
2 years ago
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