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Alenkinab [10]
3 years ago
6

N(n+1)+3=45 what number n makes kurt equation true

Mathematics
1 answer:
Advocard [28]3 years ago
7 0
N=-7 and n=6
Check:
-7(-7+1)+3=45
-7(-6)+3=45
42+3=45

6(6+1)+3=45
6(7)+3=45
42+3=45
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The graph of the function g(x) = x2 + 3x - 4 is shifted 5 units to the left. Plot the zeros of the new function on the provided
jarptica [38.1K]
Horizontal translations
 Suppose that h> 0
 To graph y = f (x + h), move the graph of h units to the left.
 We have then:
 g (x + 5) = (x + 5) 2 + 3 (x + 5) - 4
 Rewriting we have:
 f (x) = x ^ 2 + 10x + 25 + 3x + 15 - 4
 f (x) = x ^ 2 + 13x + 36
 Equaling zero we have:
 x ^ 2 + 13x + 36 = 0
 We look for the roots of the polynomial:
 (x + 9) (x + 4) = 0
 x1 = -9
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The zeros of the new function are:
 
x1 = -9
 
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7 0
4 years ago
Suppose your statistics instructor gave six examinations during the semester. You received the following grades (percent correct
zheka24 [161]

Answer:

15 samples

Step-by-step explanation:

The total sample space consists of 6 items

{79,64,84,82,92,77}

So,

n=6

The instructor has to randomly select 2 test scores out of 6.

So, r=6

The arrangement of scores selection doesn't matter so combinations will be used.

C(n,r)=\frac{n!}{r!(n-r)!} \\C(6,2)=\frac{6!}{2!(6-2)!}\\=\frac{6!}{2!*4!}\\=\frac{6*5*4!}{2!*4!} \\=\frac{30}{2}\\=15\ ways

Therefore, there are 15 different samples are possible without replacement ..

7 0
3 years ago
2 Points
Leviafan [203]

Answer:

C

Step-by-step explanation:

A parabola is set of all points in a plane which are an equal distance away from a given point and given line. The point is called the focus of the parabola and the line is called the directrix.

7 0
4 years ago
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A 30°- 60°- 90° triangle is shown below. Find the length of a and b. * leave the answer in simplified radical form*
Amanda [17]

Step-by-step explanation:

a = 12√3

b = 24

hope this helps

6 0
3 years ago
The ratio of boys to girls in a classroom is 7 to 11. If
Vesna [10]

Answer:

Step-by-step explanation:

The ratio of boys to girls is

7

:

11

, and there are

49

boys, so therefore there are

49

7

⋅

11

=

77

girls

Total number of boys and girls in the classroom is

77

+

49

=

126

.

5 0
3 years ago
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