James has x merit points. Sarah has three times as many merit points than James.
Robert has 61 fewer merit points than James.
Each merit point is worth 3 pence.
All three of the students have a total of £15.72
Work out how many merit points each student has.

Which expression is equivalent to √ -80?

Can you decompose the numbers 20,740,6,000

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?