whats 9 + 10? (im not giving you brainlist if you dont answer with the number that goes with the meme)

△cde maps to △stu with the transformations (x, y) arrowright (x − 2, y − 2) arrowright (3x, 3y) arrowright (x, −y). if cd = a + 1, de = 2a − 1, st = 2b + 3 and tu = b + 6, find the values of a and b. the value of a is and the value of b is .

When you find the area of a triangle do you use in. or in2

The length of a lap is 15 meters. if lisa wants to swim 450 meters this week,how many laps must she swim