The degrees of freedom for 120 data values when calculating a Chi-Square test statistic is: a) 120, b) 118, c) 119, d) not enough information

Anyone know? will mark brainliest if you're correct!

What is the binomial expansion of (2x-3)^5

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?