What number should be added to the expression x^2 + 4x to change it into a perfect square trinomial

choose all correct answers

4

1

8

2

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.

Need plz been trying to do it for a long time and still haven’t succeeded