Bonnie has to maintain an average of 90 in all of her classes to have an A average. In Math, she has scored 93, 70, 99 and 95 on the first four tests. What must she score on the last test to have an average of 90?

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?