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timurjin [86]
3 years ago
7

Help Please ! It would mean a lot really (also have more questions on my page)

Mathematics
1 answer:
Lyrx [107]3 years ago
5 0

Answer:

  D.  Neither group of colleges satisfies her criterion.

Step-by-step explanation:

The probability of admission to at least one of the colleges in the group is the complement of the probability of being admitted to none. That probability is the product of the probabilities of rejection from the colleges in the group.

<u>Group VW</u>

The probabilities of rejection from V and W are 0.6 and 0.75, so the probability of rejection by both is 0.6×0.75 = 0.45. The complement of that, the probability of admission to V or W (or both) is 1 - 0.45 = 0.55, which is less than 60%.

<u>Group XYZ</u>

The probabilities of rejection are 0.7, 0.8, and 0.8, so the probability of rejection by all of X, Y, and Z is 0.7×0.8×0.8 = 0.448. The complement of that, the probability of admission to X, Y, or Z is 1 -0.448 = 0.552, which is less than 60%.

Since neither group of colleges will have a probability of admission of 60% or more, neither group of colleges will satisfy her criterion.

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4. A horizontal ellipse, centered at the origin has a major axis of 10 units and minor axis of 8 units. Write the
s2008m [1.1K]

Answer:

\frac{x^2}{25} +\frac{y^2}{16} =1

Step-by-step explanation:

For ellipses, the length of the major axis is represents as:

Major axis = 2a

where a is called the semi-major axis.

In this case since the major axis is equal to 10 units:

10=2a

solving for the semi-major axis a :

a=10/2\\a=5

and also the minor axis of an ellipse is represented as:

Minor axis = 2b

where b  is called the semi-minor axis.

Since the minor axis has a length of 8 units:

8=2b

solving for b:

b=8/2\\b=4

Now we can use the equation for an ellipse centered at the origin (0,0):

\frac{x^2}{a^2} +\frac{y^2}{b^2} =1

and substituting the values for a and b:

\frac{x^2}{5^2} +\frac{y^2}{4^2} =1

and finall we simplify the expression to get the equation of the ellipse:

\frac{x^2}{25} +\frac{y^2}{16} =1

5 0
3 years ago
4x+2y=6 please solve for y
harkovskaia [24]

Answer:

y=3-2x

Step-by-step explanation:

Move all terms that don't contain y to the right and solve.

4 0
3 years ago
99 POINTS
Alik [6]

Answer:

  -a^2 - a + 12

Step-by-step explanation:

You only need to find the products of the first and last terms to determine the correct answer:

  (-a)(a) = -a^2

  (3)(4) = 12

You're looking for an expression with -1 as the leading coefficient and +12 as the constant. There is only one choice like that:

  -a^2 - a + 12

6 0
3 years ago
Read 2 more answers
Please help due soon
alexandr1967 [171]
1, -1 !!! i hope this helps (also download mathpapa :D )
3 0
3 years ago
Read 2 more answers
Plz I need help with only the perimeter one
Tcecarenko [31]

Answer:

I believe the answer is 25.3

5 0
3 years ago
Read 2 more answers
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