Tại 1 khu dân cư. Tỉ lệ gia đình sở hữu nhà là 70%, sở hữu xe là 45%, cả nhà và xe là 30%. Tính xác suất chọn một gia đình được gia đình đó sở hữu nhà hoặc xe? A.30% B.55% C.85% D.15%

Will give brainliest what is the value of x? enter your answer in the box.

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?