The sum of two numbers is 50.one number is 10 less than three times the other number. what are the two numbers. 25 and 25 45 and 5 15 and 36 40 and 10 20 and 30

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square

20.ju inces. which ordered pair is a viable solution if x represents the number of books he orders and y represents the total weight of the books, in ounces? (-3,-18) (-0.5, -3) (0,0) (0.5, 3)