3c+-9=18 I don't know how to do this problems

A spinner used for a game is divided into 3 sections: yellow, green, and orange. Janie spins the spinner 20 times. The spinner lands on green 8 times. What is the experimental probability that the spinner does NOT land on green?

How long will it take an emperor penguin to swim 14 miles if it is swimming 7 mph?

The heights of the students in a class are (in inches) 60 , 72 , 56 , 57 , 74 , 61 , 64 , 63 , 66 , 56 , 72 , 72 , 71 , 74 , 61 , 68 , 65 , 72 , 67 , and 66.

A watering can dispenses water at a rate of 0.40 gallon per minute. the original volume of water in the can was 10 gallons.

Between which two consecutive integers does √ 78 lie? a. 8 and 9 b. 6 and 7 c. 9 and 10 d. 7 and 8

How many ways are there to move from one corner of a cube to the diagonally opposite corner, in three moves, each of which travels along one edge of the cube

John rode 2 kilometers on his bike. his sister sally rode 3000 meters on her bike. who rode the farthest and how much farther did they ride? (answer in km)

Which expression is equivalent to (4√5^3) 12? 5^16/3 5^6 5^2/3 5^3/8

A patient is 68 inches tall, how many cm is the patient?

What is an algebraic expression for "46 more than n"?