3. Multiply
a. (7a-b) (a +7b)

In triangle abc segment de is parallel to the side ac . (the endpoints of segment de lie on the sides ab and bc respectively). find de, if ac=20cm, ab=17cm, and bd=11.9cm;

Solutions for 2x+7 less than or equal to 3x-5

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers