PLEASE HELP!!! The scores on the SAT test are normally distributed with =500 and =100. Your best friend in this class scored 450 in math and 480 in verbal. What are his z-scores for each test?

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.