Jellii

Jeff has a total of 22 chickens and pigs altogether. When he counted the total amount of legs the farm animals has, he got the answer of 78. How many pigs are there? How many chickens are there?

Between what two consecutive integers on the number line is the graph of the sum √30 + √50 located? Enter your answer in the form "m and n", where m and n are replaced by appropriate numbers.

John divided his souvenir hat pins into two piles. The two piles had an equal number of pins. He gave his brother one-half of one-third of one pile. John had 66 pins left. How many pins did John originally have?

If 2x - y = 3 x + y = 1 compute 8x - 7y. Please help!

Thank you!