Three U.S coins add to $1 If one of them is not half a dollar what is the smallest value coin?

1 answer:

4 0

The smallest value is $0.25 (a quarter) because you can use two quarters and a half dollar. Only one of them can't be a half dollar, but the other two can be.

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2) Formula of the axis of symmetry
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For this case we have a quadratic equation, $x ^ 2 + 28x-60 = 0$ , of the form $ax ^ 2 + bx + c = 0$