1Q: 34 km 900 m – 24 km 200 m 2Q:11 cm 50 mm × 4
3Q:18 m 90 cm ÷ 3
give me the answer pls :(

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

(hurry! ) which expression is equivalent to the following complex fraction?

Asif spent $745.10 on 13 new file cabinets for his office. small file cabinets cost $43.50 and large file cabinets cost $65.95. write and solve a system of equations to find the number of small cabinets and large cabinets he purchased. determine if each statement is true or false. 1. he purchased 5 small cabinets. true or false 2. he purchased 7 large cabinets. true or false 3. he spent $527.60 on large cabinets. true or false