Acircular swimming pool is 21 feet in diameter. what is the circumference of the swimming pool? use 22/7

The sum of two numbers is 86, and their difference is 20. find the two numbers

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.

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?