Find the solution to the system of equations.
You can use the interactive graph below to find the solution.
y=-2x + 7
(y=5x - 7

x=
y=

Can someone me with this problem i don't understand i need

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?

Need so much on this one how many yards?