John went to the deli and ordered 4 subs for $39. What would the cost be if John ordered 7 subs? (Solve using a proportion)

With both problems. a.s.a.p directions on photo ^

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

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?