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3 years ago

2. Twelve students have an

2 answers:

8 0

There are 4 boys out of the 12, so the fraction would be 4/12. This simplifies to 1/3. So there is a 1/3 possibility that a boy will be selected.

Mice21 [21]3 years ago

6 0

Step-by-step explanation:

there might just be a probability because

4 guys might be selected it says equally 12÷4=3 at least 3 guys will be selected

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Use the elimination method to solve the system of equations. Choose the

miss Akunina [59]

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Answer:

A. (4, 12)

Step-by-step explanation:

Adding the second equation to twice the first will eliminate y.

2(10x +2y) +(3x -4y) = 2(64) +(-36)

23x = 92 . . . . . . . . simplify

x = 4 . . . . . . . . . divide by 23

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3 years ago

Identify the hypothesis and conclusion of each conditional statement. Then write each sentence in if-then form

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Step-by-step explanation:

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3 years ago

Order each set of numbers from least to greatest.

lisabon 2012 [21]

Answer:

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2 years ago

Read 2 more answers

What is the equation of the ellipse with foci at (5, 0), (-5, 0) and vertices (9, 0), (-9, 0)?

forsale [732]

Answer: $\dfrac{x^2}{81}+\dfrac{y^2}{56}=1$

Step-by-step explanation:

General equation of ellipse : $\dfrac{x^2}{a^2}+\dfrac{y^2}{b^2}$

Given: Vertices of ellipse : (± 9,0)

Since the vertices are of the form (± a, 0).

i.e. a=9

Thus, the major axis is along x-axis.

Also, foci of the ellipse = (±5,0)

Since, foci is of the form (± c,0), i.e. c=5

Since

$c^2=a^2-b^2\\\\\Rightarrow\ 5^2= 9^2-b^2\\\\\Rightarrow\ b^2=81-25\\\\\Rightarrow\ b^2=56$

Equation of ellipse :

$\dfrac{x^2}{9^2}+\dfrac{y^2}{56}=1\\\\\Rightarrow\ \dfrac{x^2}{81}+\dfrac{y^2}{56}=1$

Hence, the required equation : $\dfrac{x^2}{81}+\dfrac{y^2}{56}=1$

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4 years ago

No Link or I’m blocking you :)

DaniilM [7]

Answer:

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Step-by-step explanation:

20 - 15(2²· 5/4) = Exponent
20 - 15(4 · 5/4) = Parenthesis
20 - 15(5) = Multiplication
20 - 75 = Subtraction
- 55

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3 years ago