ms wolfram had to find the distance between a mole that was living 4 feet under the ground and a bird flying 85 feet above the ground. She wrote the expression -4 - 85=-89 wat was her mistake and how should she correct it?

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

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.

Jared had 3/7 of the minutes on a family phone plan remaining for the month. the plan is shared by 2 people. if divided equally what portion of the minutes remaining on the phone plan would be avalible for each person