Solve using linear combination. y - x = -3 y + x = 3 a) (-3,0) b) (3,0) c) (0,3) d) (0,-3)

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?

What are the solutions for the following system? -2x^2+y=-5 y=-3x^2+5

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?