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algol13
3 years ago
7

Geometry class there are 15 boys and 10 girls. The students are presenting projects to the class. If Mrs. Brown selects students

at random for presentations, what is the probability that the first 2 students chosen are girls?
Mathematics
2 answers:
yaroslaw [1]3 years ago
8 0
2/25 chance that this could happen
Luda [366]3 years ago
8 0
The probability is 2/25
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Un carpintero quiere cortar una plancha de triple y de 1m de largo y 60 cm de ancho, en cuadrados lo más grandes posibles. El ca
Ugo [173]

Answer: 20\ cm

Step-by-step explanation:

The first step to solve the exercise is to make the conversion from meters to centimeters.

Since 1\ m=100\ cm, then the dimensions of the wood board in centimeters are:

Lenght=100\ cm\\\\Width=60\ cm

Now, you must find the Greatest Common Factor (GCF). The steps are:

- Descompose 100 and 60 into their prime factors:

100=2*2*5*5=2^2*5^2\\60=2*2*3*5=2^2*3*5

- Multiply the commons with the lowest exponents:

GCF=2^2*5\\\\GCF=4*5\\\\GCF=20

Therefore, the side lenght of each square must be:

s=20\ cm

7 0
3 years ago
Evaluate the expression 2ab 3+ 6a 3 - 4ab2 when a=2 and b=4.<br> a.176<br> b.180<br> c.215<br> d.216
Tom [10]
The first step for solving this expression is to insert what a and b stand for into the expression. This will change the expression to the following:
2(2)(4)³ + 6(2)³ - 4(2)(4)²
Now we can start solving this by factoring the expression
2(2 × 4³ + 3 × 2³ - 4 × 4²)
Write 4³ in exponential form with a base of 2.
2(2 × 2^{6} + 3 × 2³ - 4 × 4²)
Calculate the product of -4 × 4².
2(2 × 2^{6} + 3 × 2³ -4³)
Now write 4³ in exponential form with a base of 2.
2(2 × 2^{6} + 3 × 2³ -2^{6})
Collect the like terms with a base of 2.
2(2^{6} + 3 × 2³)
Evaluate the power of 2³.
2(2^{6} + 3 × 8)
Evaluate the power of 2^{6}.
2(64 + 3 × 8)
Multiply the numbers.
2(64 + 24)
Add the numbers in the parenthesis.
2 × 88
Multiply the numbers together to find your final answer.
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This means that the correct answer to your question is option A.
Let me know if you have any further questions.
:)
5 0
3 years ago
Three consecutive integers are n, n+1, and n+2. Four times the sum of the least and greatest integers is 12 less than three time
polet [3.4K]

Answer:

-4

Step-by-step explanation:

let n be least.

3n-12=4(n+n+2)

3n-12=8n+8

3n-8n=8+12

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n=-4

4 0
3 years ago
Simplify<br><br> 4+3[5-4 divided by(12-10)]
12345 [234]
12-10=2, 4/2=2, 5-2=3, 3*3=9, 4+9=13
8 0
3 years ago
An Arithmetic Sequence will yield a graph that is...
slava [35]

Answer:

A straight line.

Step-by-step explanation:

An arithmetic sequence has a common difference so the slope  of the graph will be constant, giving a straight line.

8 0
3 years ago
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