A father and his son can clean the house together in 9 hours. When the son works alone, it takes him an hour longer to clean than it takes his dad alone. Find how long it takes the son to clean alone.

Two adjacent angles form a right angle. What type of angle pair do they form?

12 is 2% of what? How?

Which number is not in scientific notation? A) 9 ⋅ 10 to the power of 19 B) 7.8 ⋅ 10 to the power of 6 C) 1.45 ⋅ 10to the power of - 7 D) 0.33 ⋅ 10 to the power - 15

Find the geometric mean of the pair of numbers below. If necessary, give the answer in simplest radical form. 5 and 18

Which function in the vertex form is equivalent to f (x) = 4+x2-2x

11/6 as a mixed number

If an item is marked $520 during a 20% off sale, what is the regular price

A gardener buys a plant that is 12cm in height. Each week after that the plant grows 10cm. Note: The plant is 12cm high at the beginning of the week. what is the formula and value for t10 and t12 in an arithmetic sequence?

Andrea's family stopped at the gas station to get gas. At gas stations, the price of gas per gallon is given to the nearest thousandth.

Emeril mixed 3/10 cup balsamic vinegar with 2/10 cup oil to make a salad dressing. Then he use 1/10cup of mixture for a large salad how much oil and vinegar mixture was left over?