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# Operations and Inequalities

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1. What is the inherent meaning and justification of cross multiplication as it applies to solving an equality?

2. Is | x -2 | the same as | 2 - x |? Please explain your answer.

3. How do you express the following mathematically?
a. y is at least 3
b. y is more than 3
c. y is at most 3
d. y is less than 3

https://brainmass.com/math/basic-algebra/operations-inequalities-126906

#### Solution Preview

1. What is the inherent meaning and justification of cross-multiplication as it applies to solving an equality?

When you cross-multiply, you're really multiplying each side by n/n,
where n is the denominator of the other side:

a c
- = -
b d

a d c b
- * - = - * -
b d d b

Note that this ...

#### Solution Summary

Operations and inequalities are investigated. The solution is detailed and well presented.

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