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Answers by Oren S.

One centimeter and one decimeter are both units on the metric scale.  Since the metric scale uses SI prefixes, it is very easy to compare units.   1 kilometer=10 hectometers 1 hectometer=10 decameters 1 decameter=10 meters 1 meter=10 decimeters 1 decimeter=10 centimeters 1...

There are three envelopes which each have independent choices between three options.  Thus, there are a total of 3*3*3=27 different ways the money can be configured.   Of those 27 ways, four of them add up to exactly $60:   1.  $5+$5+$50 2.  $5+$50+$5 3...

d+ 2d - 8 = 0 (answer)

As has been noted above, the problem can be solved both factoring and the quadratic formula.  If you can't factor or remember the formula, you can also solve it using a process called completing the square. First, divide the equation through by a, and subtract c from both sides...

The answer is y=3x+1. There are several ways to find the answer to this question, and a few different formats in which to put the answer.  I prefer slope-intercept form, so I will explain it by that method. y=mx+b m=slope b=y-intercept The y-intercept is the value...

A cube has 8 vertices (corners, points), 12 edges (line segments), and 6 faces (planes).  One formula that works for any solid with flat sides and no holes is vertices+faces-edges=2.