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svlad2 [7]
3 years ago
10

Please help me if you can!!

Mathematics
1 answer:
dangina [55]3 years ago
3 0

Answer:

For the extra credit question just plant the dotss and if its a square then do what it sais

Step-by-step explanation:

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In a given binomial distribution, there are 625 trials, and the probability of success is p =0.29. What is the variance?
Shkiper50 [21]

Answer:

128.69.

Step-by-step explanation:

The variance is np(1 - p)

= 625*(0.28) * 0.71

= 128.69.

3 0
3 years ago
If the directrix of a parabola is the horizontal line y = 3, what is true of the parabola?
12345 [234]
The correct answer is b), or x² = -12y.

Explanation:
This equation may be written in standard form as
y=- \frac{1}{12} x^{2}
The coefficient in front of x² is negative so the curve is downward.
The vertex has coordinates (0,0).
The vertex is equidistant from the directrix and the focus, so the focus is (0, -3).

3 0
3 years ago
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Solve for y.
Illusion [34]

Answer:

y=-1/4, 2.

Step-by-step explanation:

4y^2=7y+2

4y^2-7y-2=0

factor,

(4y+1)(y-2)=0

zero property,

4y+1=0, y-2=0,

4y=0-1=-1,

y=-1/4,

y=0+2=2.

4 0
3 years ago
The least common denominator of two fractions is 24. If you add the two denominators their sum is 14. What are the denominators
natka813 [3]
I don’t know I’m sorry
7 0
3 years ago
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Cara computes the mean and variance for the set 87, 46, 90, 78, and 89. She finds the mean to be 78. Her steps for finding the v
Olin [163]

Answer:

She put the negative sign for the 32 outside the parentheses

Step-by-step explanation:  Got it correct on edg.

3 0
3 years ago
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