The grades on a chemistry midterm at Loyola are roughly symmetric with μ=67 and σ=5.5 Tiffany scored 53 on the exam. Find the z-score for Tiffany's exam grade. Round to two decimal places.

Pepe is going to spin the following spinner 800 times. the spinner is divided into equal sections.a. exactly 160 timesb. clost to 160 times but probably not exactly 160 timesc. exactly 640 timesd. close to 640 times but not probably not exactly 640 times. me

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

At store a, erasers are sold individually. the cost y of x erasers is represented by the equation y=0.75x. the costs of erasers at store b are shown in the graph.