Ashipping box should weigh 1.0 pound. if there is a 10% error on the weight, what is the range of acceptable weight?

12 point are triangles pqr and stu congruent? what is the congruency that proves they are congruent? what is the perimeter of triangle pqr?

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

How do you solving the solution of each system using elimination?