The CDs sold for $5.00 each, and the DVDs sold for $3.00 each.

If the total cost of the items was $73.00 and the total number of products sold was 17, find how many of each item Joe bought.

Nann
2021-08-12
Answered

At a flea market, Joe bought some DVDs and CDs.

The CDs sold for $5.00 each, and the DVDs sold for $3.00 each.

If the total cost of the items was $73.00 and the total number of products sold was 17, find how many of each item Joe bought.

The CDs sold for $5.00 each, and the DVDs sold for $3.00 each.

If the total cost of the items was $73.00 and the total number of products sold was 17, find how many of each item Joe bought.

You can still ask an expert for help

Bentley Leach

Answered 2021-08-13
Author has **109** answers

Let x be the number of CDs bought and y be the number of DVDs bought.

The total number of products sold was 17:

The total cost of the items was $73.00:

Solve for y using (1) to obtain (3):

Substitute (3) to (2) and solve for x:

Solve for y using (3):

Joe bought 11 CDs and 6 DVDs

asked 2021-09-10

A baseball team plays in a stadium that holds 55,000 spectators. With ticket prices at 10, the average attendance had been 27,000. When ticket prices were lowered to10,the average attend ance had been 27,000.When ticket prices were lowered to 8, the average attendance rose to 33,000. How should ticket prices be set to maximize revenue?

asked 2021-06-11

Find the linear approximation of the function

asked 2021-09-07

Whether each of these functions is a bijection from R to R.

a) $f(x)=-3x+4$

b) $f\left(x\right)=-3{x}^{2}+7$

c) $f(x)=\frac{x+1}{x+2}$

$d)f\left(x\right)={x}^{5}+1$

asked 2022-10-24

Since every function can be divided in a even and a odd part:

$${f}_{e}(x)=\frac{f(x)+f(-x)}{2}$$

$${f}_{o}(x)=\frac{f(x)-f(-x)}{2}$$

$$f(x)={f}_{e}(x)+{f}_{o}(x)$$

How can I obtain the function by it's even part?

$${f}_{e}(x)=\frac{f(x)+f(-x)}{2}$$

$${f}_{o}(x)=\frac{f(x)-f(-x)}{2}$$

$$f(x)={f}_{e}(x)+{f}_{o}(x)$$

How can I obtain the function by it's even part?

asked 2022-09-28

asked 2022-06-27

(2x+3)=8mod12

asked 2021-08-17

In each item, do the following analytically:
(a) find the relative extrema of f.
(b) determine the values of x at which the relative extrema occur.
(c) determine the intervals on which f is increasing.
(d) determine the intervals on which f is decreasing.
$f\left(x\right)=2-{(x-1)}^{\frac{1}{3}}$