What is the gcf of the expression 21xy + 7xz - 11xyz? a. xy b.7x c. x d.7y

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.

What is the value of x in this triangle? a. 53° b. 62° c. 65° d. 118°