Fill in the blanks to make this sentence true. The greater than symbols looks like this , and the less than symbol looks like this, PLZ HELP ME

What is the value of x? enter your answer in the box. (cm)

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?