Which of the following circles have their centers on the x-axis? check all that apply. a.(x - 0)2 + (y - 5)2 = 49 b.(x - 0)2 + (y - 0)2 = 25 c.(x - 4)2 + (y - 0)2 = 22 d.(x + 1)2 + (y - 7)2 = 16

Circles having their centers on the x-axis has a y-component or coordinate equal to zero. In this case, with the standard equation of the circle equal to (x-h)^2 + (y-k)^2 = r^2, the one that fits the description of the problem is B.(x - 0)2 + (y - 0)2 = 25 and C.(x - 4)2 + (y - 0)2 = 22

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

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