Rachel is selling t-shirts. it costs her $5 each week to advertise her t-shirts. she buys each t-shirt for $3.50 and sells each one for $8.00. write an equation to model the amount of profit, p, she makes from selling x t-shirts in one week. p = 3.50x − 5 p = 8x − 3.5 p = 5x + 3.5 p = 4.5x − 5

Explain how you can use the triangle sum theorem to find the measures of the angles in an equilateral triangle. the angles of an equilateral triangle are . let the measure of each angle be x. then, by the triangle sum theorem, x + x + x = 3x = ° solving for x gives x = °

Student price tickets to a movie are $1 and non student tickets are $2 . 350 tickets are sold and the total amount made is $450. there were 250 student tickets sold . true or false .

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?