Why is the constant of proportionality a useful concept?

Joanna joins a CD club. She pays $7 per month plus ten for each CD she orders. write an inequality to find how many CD's she can purchase in a month if she spends no more than $100. Identify wht your variable represents

To decrease an amount by 70%, what single multiplier would you use? How do i work this out?

Brian rides his bike 0.27 of a mile per minute. If it takes him 27 minutes to ride his bike to his friend's house, how far away does his friend live?

How many different 5 digit street addresses can have the digits 4 7 3 4 and 8

Express the square root 75 in simplest radical form.

2lb/wk = how many oz per day "

3 (5-2x) = -4 (cx+4) What value for c in the equation above will make the equation have no solutions?

Five times a number yield 20

What is the line slope passing through (-3,1) and (-1,5) a. 2 b.-2 c.-1 d. 1

Problem 1. Martin opened a savings account with $50. Every week he deposited $10 into the account 1. Which equation best represents Martin's situation?