Sumston Village School organised a concert to raise money for charity. All of the 120 tickets were sold for a total of £1210.
The price of an adult's ticket was £12.
The price of a child's ticket was £7.
How many adult tickets and how many child tickets were sold?
You must use an algebraic method.

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?