Gieo đồng thời 2 con xúc xắc. Tính xác suất để: a) tổng số chấm xuất hiện trên 2 con là 7.
b) tổng số chấm xuất hiện trên 2 con hơn kém nhau 2.

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.