How do I solve x-y=11 2x+y=19

Classify the angle in exercise 3 as acute, right, or obtuse.

3 (x-7) + 8=-20 can someone explain how to do this step by step

Bob's lawn-mowing service is a profit-maximizing, competitive firm. bob mows lawns for $27 each. his total cost each day is $280, of which $30 is a fixed cost. he mows 10 lawns a day.

Ifa=1 fine the value of 2a

What are the coordinators of the vertex of the graph of the function - 2 (x-1) ^2 = y+5

Which of the following numbers are ordered from least to greatest 1. 1/5,.37,73%, 4/5,.75 2. 7 / 8,.75, 1/2,3 / 8, 1 3. 1/2,. 64, 7/8,.135, 3 4. 4%, 3 / 8, 12 / 24, 70%, 1

Dan had 175 dollars to spend on 6 books. After buying them he had 13 dollars. How much did each book cost?

Angle I measured 20 degrees, side HI = 5, angle L = 20 degrees, and side KL = 5. What additional information would you need to prove that triangle HIJ is congruent to triangle KLM by SAS

In the barn, there are horses and chickens. There are 11 heads and 32 legs altogether. How many chickens are there? A. 6 B. 5 C. 4 D. 3

What is 5.9 as a mixed number and a improper fraction?