Hector replaced 1/3 of the buttons on his coat. if he replaced a total of 3 buttons. how many buttons are on his coat in all?

The length of triangle base is 26. a line, which is parallel to the base divides the triangle into two equal area parts. find the length of the segment between triangle legs.

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase