3x - 12=18 I keep getting different answers so I wanna I be positive Wich one is right

A brand of cereal had 1.2 mg of iron per serving. Then they changed their recipe so they had 1.8 mg of iron per serving. What was the percent increase in iron?

The weights of bags of ready-to-eat salad are normally distributed with a mean of 290 grams and a standard deviation of 10 grams. What percent of the bags weigh less than 280 grams? 13.5% 16% 34% 36.5%

If an item is $9.99 regular price, and is on sale for 7.49. what is the discount amount?

You randomly choose an integer between 1 and 25. How many favorable outcomes are there for choosing an odd multiple of 3? A. 4 B. 8 C. 13 D. 25

What is 1/4 + 1 1/3?

The independent variable is the length of the side of a cube and the dependent is the volume of a cube. Is this relationship a function?

The current student population of Hartford is 1400. If the population decreases at a rate of 6.1% each year. What will the student population be in 6 years?

What is 1700000 divided by, 10?

How do you solve c for a/b=c

In which situation would you opt for a car lease? A. You don't like to drive, and would prefer the services of a driver. B. You want to buy a car, and keep it for a long period of time. C.