Which equation is equivalent to 4.5 = 2a? a = 2.5
a = 2.25
4.5a = 2
a + 2 = 4.5
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The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Aline has a slope of and a y-intercept of –2. what is the x-intercept of the line?

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.