I need help with adding decimals

2 answers:

4 0

When you add the decimals it’s the same as regular adding. You line up the decimals and then add all the way across and when you get to the decimal carry it down

Temka [501]3 years ago

3 0

Line the decimals of your numbers up in a column

to add
3.5, 3.25, and .1

(any empty place becomes a zero)

3.50
3.25
0.10

6.85 would be the total.

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the only possible value of x is 5
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Step-by-step explanation:

The cubic equation ...

(x -3)(x -1)(x +5) = 80

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width = 5 - 1 = 4

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The dimensions are (length, width, height) = (2, 4, 10).

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We cannot tell the thrust of the problem, since it has only one solution. Perhaps you're supposed to write the cubic in standard form and use the Rational Root theorem to find possible values of x. That form can be found to be ...

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We know that x must be greater than 3 (so all dimensions are positive). Thus possible values of x are 5, 13, 65, and we're pretty sure that 65 is way too large.