Paige spent $7.55 on some report covers and one lanyard at the spirit shop. each report cover costs $0.35 and the layard cost $6.50.how many report covers did paige buy? write and solve an equation without decimals.

Ameteorologist is studying the monthly rainfall in a section of the brazilian rainforest. she recorded the monthly rainfall, in inches, for last year. they were: 10.4, 10.3, 11.7, 11.1, 8.0, 4.4, 2.6, 1.8, 2.5, 4.4, 7.3, 9.5 fill in the missing values in the formula. what is the variance?