Cho a, b,c là ba số thực thỏa mãn a, b>0 và a+b+c=1. Chứng minh rằnga) (a+b)*(a+c)=a+bcb) √(a+b)(b+ca)/c+ab=a+b

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

You wanted to draw an enlargement of design that printed on a card that is 4 in by 5

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212