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sweet [91]
3 years ago
14

How do you solve the equation by factoring or square roots Ex: x^2-4x=0

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
3 0
x^2-4x=0\\
x(x-4)=0\\
x=0 \vee x=4

-------------------------------------------------

3x^2=48\\
x^2=16\\
x=-4 \vee x=4\\\\
\hbox{or}\\\\
3x^2-48=0\\
3(x^2-16)=0\\
3(x-4)(x+4)=0\\
x=4 \vee x=-4
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A class has 35 students, of which 16 are male and 19 are female. If 6 of the students are selected at random to form a committee
madreJ [45]

Answer:

The probability of choosing exactly 2 male and 4 female students =\frac{\binom{16}{2}\times \binom{19}{4}}{\binom{35}{6}}

Step-by-step explanation:

We are given that a class has 35 students

Number of male=16

Number of female=19

We have to choose 6 students for committee

We have to find the probability that exactly 2 male students are selected

Probability=P(E)=\frac{number\;of\;favorable\;cases}{total\;number\;of\;cases}

If we have to choose total 6 student in which 2 male and 4 female

Combination formula:

nC_r=\frac{n!}{r!(n-r)!}

Using the formula

The probability of choosing exactly 2 male and 4 female students =\frac{\binom{16}{2}\times \binom{19}{4}}{\binom{35}{6}}

5 0
3 years ago
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8 0
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8 0
3 years ago
Does anyone understand how to solve this?
Nataliya [291]

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b (3(x + h)^2 + x + h + 3 - (3x^2 + x + 3)) / h

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= (6xh + h + 3 h^2) / h

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Suppose an auto racer won a 400 mile race with a time of ​1:41​:58. at one point the racer was 40 miles closer to the finish tha
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400/2 = 200
200 + 20 = 220
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Answer: He had gone 220 miles.

He was 180 miles from the finish and 220 from the start, so he was 40 miles closer to the finish than to the start.
7 0
3 years ago
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