Can someone please help with this and explain how you the answer, I'll mark you as brainliest

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.