Scores on a algebra test have average of 78 with standard deviation of 10. what is the z-score for a student who earned a 92 on the test? round your answer to the nearest thousandth.

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Yuto and hila attempted to solve the same inequality. their work is shown below. which statement is true about the work shown above? yuto is correct because he isolated the variable correctly and reversed the inequality symbol. yuto is incorrect because he should not have reversed the inequality symbol. hila is correct because she isolated the variable correctly and reversed the inequality symbol. hila is incorrect because she should not have reversed the inequality symbol.

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?