![190x +80(3x) = 3440](https://tex.z-dn.net/?f=190x%20%2B80%283x%29%20%3D%203440)
x represents how many are sold. then multiply 80×3
![80 \times 3 = 240](https://tex.z-dn.net/?f=80%20%5Ctimes%203%20%3D%20240)
then add your x together
![190x + 240x = 430x](https://tex.z-dn.net/?f=190x%20%2B%20240x%20%3D%20430x)
then you must divide your x by 3440
![3440 \div 430 = 8](https://tex.z-dn.net/?f=3440%20%5Cdiv%20430%20%3D%208)
8 is how many higher-priced speakers take you 8 and multiple it by 3 to get how many lower-priced speakers
![8 \times 3 = 24](https://tex.z-dn.net/?f=8%20%5Ctimes%203%20%3D%2024)
you have 24 low priced speaker and 8 high priced speakers.
To find the length of the base using the information given, you will use the formula for finding the area of a parallelogram and solve for the missing base.
A =bh
<u>160.5</u> = <u>7.5b</u>
7.5 7.5
b = 21.4 inches
The length of the base is 21.4 inches.
Answer:
20
Step-by-step explanation:
This is the formula for a combination. Substitute the values and evaluate the expression.
![\frac{n!}{r!(n-r)!}\\\\\frac{(6)!}{(3)!(6-3)!}\\\\\frac{(6)!}{(3!)(3!)}\\\\\frac{(6\cdot5\cdot4\cdot3\cdot2\cdot1)}{(3\cdot2\cdot1)(3\cdot2\cdot1)}\\\\\frac{720}{(6)(6)}\\\\\frac{720}{36}\\\\ 20](https://tex.z-dn.net/?f=%5Cfrac%7Bn%21%7D%7Br%21%28n-r%29%21%7D%5C%5C%5C%5C%5Cfrac%7B%286%29%21%7D%7B%283%29%21%286-3%29%21%7D%5C%5C%5C%5C%5Cfrac%7B%286%29%21%7D%7B%283%21%29%283%21%29%7D%5C%5C%5C%5C%5Cfrac%7B%286%5Ccdot5%5Ccdot4%5Ccdot3%5Ccdot2%5Ccdot1%29%7D%7B%283%5Ccdot2%5Ccdot1%29%283%5Ccdot2%5Ccdot1%29%7D%5C%5C%5C%5C%5Cfrac%7B720%7D%7B%286%29%286%29%7D%5C%5C%5C%5C%5Cfrac%7B720%7D%7B36%7D%5C%5C%5C%5C%2020)