Evaluate the expression a - b for a = 31 and b = 20.

Сумму чисел 165 и 633 уменьшили в несколько раз получили 266. Чему равно неизвестное число? составь и реши уравнения

What is the exact value of sin 45°? enter your answer, as a simplified fraction.

What is 86310 in yards

You roll a standard number cube one time and you spin a spinner with one through eight on and equal sections what is the probability you roll an even number and you spinner lands on on an add number

It takes Chance 16 hours to rake the front lawn while his brother, Omar, can rake the lawn in 12 hours. How long will it take them to take the lawn working together?

5. Andre is solving the equation 4 (x + 3) = 7. He says, "I can subtract from each side to get 4x = 1 and then divide by 4 to get x = " Kiran says, "I think you made a mistake." a. How can Kiran know for sure that Andre's solution is incorrect? b.

On three examinations, Dana received scores of 84, 89, and 78. What score does Dana need on the fourth examination to raise his average to 85?

You have a Spanish meeting every forth day and a math club meeting every tenth day. Today you have both meetings. In how many days will you have both meetings on the same day again?

5.2 turned into a fraction in simplest form.

A certain laptop is really popular and sells for $199.99. Since sales are so good, the store raises the price by 13%. What is the cost of the laptop after the markup?