Luis left home with $5.50 in his wallet. he spent 3.25 on drinks and $2.00 on a magazine. later, his friend repaid him $3.50 that he had borrowed the previous day. how much did luis have in his wallet then?

Which statements about these triangles is true

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )