Can a cubic equation have 3 complex roots? 3 real roots? ...?

1 answer:

7 0

No, a cubic equation can not have three complex roots. This is because it turns twice and one end goes to positive infinity and one end goes to negative infinity. Thus, one of these MUST cross the x-axis at some point, meaning y = 0 and a real root exists.

Yes, a cubic equation can have three real roots if it cuts the x-axis three times.

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A toy store is is selling yo-yo's for $12. The price includes a 25% mark up from the wholesale price. What was the wholesale pri

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15 because 25% = 0.25 then you multiply 12×0.25=15

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Which set of coordinates satisfies the equations 3x − 2y = 15 and 4x − y = 20?

Ksivusya [100]

Answer:

C. (5,0)

Step-by-step explanation:

you can check the graph at the point where those two lines meet

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you will solve for x=5 and y=0 if you use elimination/substitution

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What are the minimum, first quartile, median, third quartile, and maximum of the data set? 45,76,12,39,87,65,23,32

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Minimum=12, Q1=27.5,median=42,Q3=70.5,maximun=87. To get your answer you need to use a graphing, go to stat, edit, add all the number in L1, you press stat again, you go to CALC and press number 1 and enter.it seem a lot but it's pretty fast. hope this helps.if if does please add brainliest

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3 years ago

The state runs a lottery once every week in which six numbers are randomly selected from 11 without replacement. A player choose

nalin [4]

Answer:

a) 2.60x10^-7

b) 5.31x10^-5

c) 2.19x10^-3

Step-by-step explanation:

X=number of hits

The probability is the number of desired outcomes divided by the total number of all outcomes.

Then

a) P(X=6)=P({1, 1, 1, 1, 1, 1})=6/40*5/39*4/38*3/37*2/36*1/35=2.60x10^-7

b) P(X=5)=P({0, 1, 1, 1, 1, 1})+P({1, 0, 1, 1, 1, 1})+...+P({1, 1, 1, 1, 1, 0}), every one of these have the same probability

P(X=5)=6P({1, 1, 1, 1, 1, 0})=6*(6/40*5/39*4/38*3/37*2/36*34/35)=5.31x10^-5

c) P(X=4)=P({0, 0, 1, 1, 1, 1})+...+P({1, 1, 1, 1, 0, 0}) every one of these have the same probability.

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3 years ago

Is this sss, asa, sas or none

Arlecino [84]

Answer: ASA

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Explanation:

ASA stands for "angle side angle"

The first A refers to the bottom left pairs of angles for the triangles. They have one single arc mark to indicate they pair up and are congruent.

The S refers to the bottom sides of the triangle having the same length (the single tickmark shows they are congruent)

The second A is for the pair of angles on the bottom right side of the triangles. These angles have 2 arc marks.

The order of the lettering is important because the S in ASA is between the two angles. As the diagram shows, the sides mentioned are between the angles mentioned. Contrast this with AAS or SAA which has the sides not between the angles.

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4 years ago

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