How old was Lisa x years ago us she is now 13?

Which expression represents this?

A) x+13

B) x-13

C) 13-x

Find the estimate & difference for 4-1.29

Make b the subject of the formula a = sqrt (b+6)

Without multiplying, how can you tell which product will be greater, 4 X 3 or 4 X 5? Explain.

What is the first step to 2x + 3y = 12?

For a normal distribution, what percentage of data falls within one standard deviation of the mean?

3x-2y=-2 6x-2y=10 solve by elimination

A marketing firm is studying consumer preferences for winter fashions in four different months. From a population of women, 18-21 years of age, a random sample of 100 women was selected in January.

Which is bigger 15%or 1/5?

What is - 10=xy+z for x?

List three levels of craftspeople you might find in a shoemaker's shop and describe their duties