A, E and B lie on a straight line segment. C, D and B lie on a straight line segment.
BD = 4m, CD = 16m and AB = 21m.
Work out the length of BE.
Give your answer as a decimal.

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Amir wants to proportionally increase the size of a photo to create a poster for his room. the size of the original photo is shown. complete the statement and then answer the question to represent ways that amir can increase the size of his photo.

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?