The length of the blue ribbon is two-thirds the length of the red ribbon. write and equation you can use to find the length r of the red ribbon. the blue ribbon is 30 cm.

Change negative exponents to positive, then solve

Cate purchases $1600 worth of stock and her broker estimates it will increase in value by 4.2% each year. after about how many years will the value of cate's stock be about $2000

3/4 + p = 1/2? i’m not sure how to solve it