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Sholpan [36]
3 years ago
11

The grades received by 200 students follow a normal distribution. The mean of the grades is 70%, and the standard deviation is 7

%.
The number of students who received a grade greater than 70% is about
, and the number of students who got a grade higher than 84% is about
.
Mathematics
1 answer:
barxatty [35]3 years ago
5 0
2 babababababababbabababababababababababa
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How many quarters are in $375.75?​
DanielleElmas [232]

Answer:

1503 quarters

Step-by-step explanation:

There are 4 quarters in 1 dollar, so we multiply this number by 4.

375.75 * 4 = 1503

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2 years ago
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Find a quadratic polynomial with integer coefficients which has x = 2/9, ± SQRT23/9 as its real zeros.
melomori [17]

Answer:

The quadratic polynomial with integer coefficients is y = 81\cdot x^{2}-36\cdot x -19.

Step-by-step explanation:

Statement is incorrectly written. Correct form is described below:

<em>Find a quadratic polynomial with integer coefficients which has the following real zeros: </em>x = \frac{2}{9}\pm \frac{\sqrt{23}}{9}<em>. </em>

Let be r_{1} = \frac{2}{9}+\frac{\sqrt{23}}{9} and r_{2} = \frac{2}{9}-\frac{\sqrt{23}}{9} roots of the quadratic function. By Algebra we know that:

y = (x-r_{1})\cdot (x-r_{2}) = x^{2}-(r_{1}+r_{2})\cdot x +r_{1}\cdot r_{2} (1)

Then, the quadratic polynomial is:

y = x^{2}-\frac{4}{9}\cdot x -\frac{19}{81}

y = 81\cdot x^{2}-36\cdot x -19

The quadratic polynomial with integer coefficients is y = 81\cdot x^{2}-36\cdot x -19.

5 0
2 years ago
Milan drove 715 miles in 11 hours. At the same rate, how many miles would he drive in 9 hours?
Gwar [14]

Answer:

585 miles

Step-by-step explanation:

Basically since he drove 715 miles in 11 hours you would have to divide the 2 numbers then you get 63.

63 is the rate so then you multiply by 9 hours then that's your miles.

585 miles

7 0
3 years ago
What is the minimum number of triangles required to construct a 10 sided polygon
kupik [55]

10 Triangles fit inside a Decagon

Hope it helps :)

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3 years ago
What is an equation of the line in slope intercept form? M=2/3 and y intercept is (0,-3)
lana66690 [7]

Answer:

y= (2/3)x -3

Step-by-step explanation:

M is equal to the slope in y=mx+b form. And the y intercept is equal to (0, -3), therefore the b part of the formula is -3.

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3 years ago
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