X2 + 4x -9 = (x + a)? +b
Find the value of a and the value of b.
a =
b=
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Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.

Multiply sixth of sixty six by a half of ten show step by step method

There are two major tests of readiness for college: the act and the sat. act scores are reported on a scale from 1 to 36. the distribution of act scores in recent years has been roughly normal with mean µ = 20.9 and standard deviation s = 4.8. sat scores are reported on a scale from 400 to 1600. sat scores have been roughly normal with mean µ = 1026 and standard deviation s = 209. reports on a student's act or sat usually give the percentile as well as the actual score. the percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than this one. tanya scores 1260 on the sat. what is her percentile (± 1)?