What is lcm? find the lcm of 20 and 30.

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.