mcclendoncassandra

20.12.2019 • 

Mathematics

Maria is to select one number from the set {60,61,62,63,64,65,66,67,68,69} at random. consider the following three events. event x: the selected number is an even number. event y: the selected number is a multiple of 3. event z: the selected number is a multiple of 5. part a: list the outcomes that are in event x or in event y but not in both events. part b: list the outcomes that are in both events x and y but not in z.

Ответ:

alex7881

24.05.2020

Mathematics

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vertex of the parabola

Step-by-step explanation:

v(t) = −2x²+ 22x + 280

v = value of her investment

t = time in weeks.

(a) What key feature of the function tells us when her investment was worth the most?

worth the most = highest value, so at the vertex of the parabola.

xvertex = -b/2a

yvertex = -Δ/4a

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