The temperature in Greenland was -12°. For 4 hours the temperature rose 3º every hour.
What was the temperature after 4 hours?
Please help me with this math problem

Which of the following statements is not true? a.parallel lines are lines in the same plane that never intersect. b.congruent figures have the same shape and same size angles and sides. c.similar figures must have the same shape and the same size. d.a rotation is when you turn a figure around a certain point.

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10