11. the price of gas increases from $2.20
per gallon on monday to $2.31 per gallon
on tuesday. what is the percent of
increase?

Name the quadrilaterals that have four equal sides.

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

If 25% of y is 30, what is 60% of y?