Use a graphing calculator to approximate the vertex of the graph of the parabola defined by the following equation. y = x squared + 2 x minus 9
a.
(-1, -10)
c.
(1, 10)
b.
(-1, -9)
d.
(1, -10)

Ms. sutton recorded the word counts and scores of the top ten essays in a timed writing contest. the table shows her data. how does the word count of an essay relate to its score in the contest? word count tends to decrease as the score decreases. word count tends to increase as the score decreases. word count tends to remain constant as the score decreases. word count has no apparent relationship to the score of the essay.

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?