Find the HCF and LCM of the smallest composite and smallest prime number​

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels