Which equation represents the statement? cindys age, x, is 3 times her age 6 years ago.
a. x=3x-6
b. x=3(x-6)
c. x=3x+6
d. x=3-6x

Emily and her feiends qent to the park. they saw 15 robins and 9 blue jays. how many birds did they see? explain how you decided what number sentence to write.

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

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?