Is the sequence 5, 9, 15, an arithmetic sequence?

What’s the answer ? use the picture to see the problem

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?

If an object looks the same on both sides when divided by a plane, it has gos rotational symmetry. no plane of symmetry. o reflectional symmetry. o no axis of symmetry.