Which of the following expressions are equivalent to -(-8/-4)1. -(-8/4) 2. 2
3. none of the above
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Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?