Which statements can be used to write an algebraic expression to represent the phrase? the product of a number and eighteen Check all that apply. Replace “a number” with a variable. Product represents addition. Product represents multiplication. The coefficient is 18. The correct algebraic expression is 18t. 18 is a variable. The correct algebraic expression is StartFraction t Over 18 EndFraction. hel please

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a. the profit when the unit price is equal to 0b. the unit price(s) when the profit is equal to 0c. the profit when the unit price is greatestd. the unit price(s) when profit is greatest

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

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.