Which of the following expressions are equal to the one below? check all that apply 7 x (9-5) a.9 x 7-5 x 7 b.(7 x 9)-5 c.(9-5) x 7 d.7 x 9-7 x 5

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Two parallel lines are crossed by a transversal. what is value of x

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?