＼(º □ º l|l)/ i dont understand

What is the common difference for this arithmetic sequence? -6,-2,2,6,10 a.4 b.5 c.3 d.6

The dash figure is a dilation if the original figure. find the scale factor. classify the dilation as an enlargement or a reduction

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?