At a grilled cheese cafe, there are three possible kinds of bread you can have and 5 possible different types of cheese you can choose from. How many variations of grilled cheese can you possible have?
Three kinds of bread times 5 kinds of cheese equals (3 x 5 = 15) fifteen different types of grilled cheese sandwiches.
Solve for x in (b) using equation (a) to find y. (a) 2y + 12 = 14 (b) 8x / (9 + y) = 8
(a) 2y + 12 = 14 -12 -12 2y = 2 /2 /2 y = 1 (b) 8x / (9 + y) = 8 8x / (9 + 1) = 8 8x / 10 = 8 *10 *10 8x = 80 x = 10 <--- final answer
A gas has a pressure of 2 atm with a volume of 4 L at 290K, what is the pressure of the gas if the volume expands to 8L and temperature remains constant?
PV = NRT P1(V1)=P2(V2) P1(V1)/V2=P2 2atm(4L)/8L = 1atm The pressure is now 1 atm.