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Alekssandra [29.7K]
3 years ago
10

Results for a 20-point multiple choice math quiz are as follows: 9 students scored a 20,4 students

Mathematics
1 answer:
Ray Of Light [21]3 years ago
3 0

Answer:

18 1/2 or 37/2

Step-by-step explanation:

To calculate the average of something, we add the numbers and divide by the count of those numbers. In this case, we have this as the sum of the numbers:

9 × 20 + 4 × 19 + 3 × 18 + 5 × 17 + 12

And the number of students as the count:

9 + 4 + 3 + 5 + 1

Now to calculate that out:

(9 × 20 + 4 × 19 + 3 × 18 + 5 × 17 + 12)/(9 + 4 + 3 + 5 + 1) ⇒

(180+76+54+85+12)/(9+4+3+5+1) ⇒

407/22 ⇒

37/2⇒

18 1/2

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A transformation T:(x,y) (x-5,y+3) the image of A(2,-1) is
kodGreya [7K]
According to the transformation, the image of (x,y) is (x-5, y+3). Therefore, plug in the coordinates of A, or x=2, y=-1 into (x-5, y+3), and the image of A is (2-5, -1+3)=(-3, 2).
3 0
4 years ago
F(x) = two divided by quantity x squared minus two x minus three
VARVARA [1.3K]
F(x) = 2÷(x² - 2x - 3)

1)
Domain:
The domain is all the values for x that will produce a real number for y
Factor the denominator to find where y is not defined:
f(x) = 2÷(x² - 2x - 3) 
f(x) = 2 ÷ (x-3)(x+1)
The domain is all real numbers except x=3 and x=-1

Range:
The range for y is all the values that y can take, given the domain.
The range is all real numbers, because y approaches both positive and negative infinite at different points on the graph. 

The y-intercept is where x=0
y= 2 ÷ (0² - 2(0) -3)
y= 2 ÷ -3 = -2/3

The x-intercept are the points at which y=0.
Let's use the factored form again: 
f(x) = 2 ÷ (x-3)(x+1)
This function has no x-intercepts. All values of X either produce a real number, or are undefined in the case of x=3 and x=-1

Horizontal Asymptotes
As X approaches inifinite, how does y behave?
f(x) = 2÷(x² - 2x - 3) 
As x approaches both positive and negative infinite, the dominate term in the denominator, x², is vastly greater than 2, and thus y approaches zero. 
The horizontal asymptote is zero, in both the positive and negative direction. 

Again, let's consult the factored form:
2 ÷ (x-3)(x+1)
There are vertical asymptotes at both x=3 and x=-1. As x approaches these numbers, depending on whether x is a little bigger or smaller than either one, y approaches positive and negative infinite, since the denominator of the function approaches zero.
Therefore, there are both positive and negative vertical asymptotes at both x=3 and x=-1

As for the graph, we'll leave that to you and the many applications that can aid in such a task!
4 0
4 years ago
Change to a decimal: 14 1/2 %.<br><br><br> 0.145<br><br> 0.0145<br><br> 14.5
bearhunter [10]
The answer is <span>0.145</span>
<span>14 1/2 can be expressed as:
</span>14  \frac{1}{2} = 14+ \frac{1}{2} =14+ \frac{1*5}{2*5} = 14+ \frac{5}{10} = 14 + 0.5 = 14.5
<span>
Since we know that x% is x/100, then </span>14 1/2 % can be expressed as:
14 1/2% = 14.5% = 14.5/100 = 0.145
8 0
3 years ago
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Answer:

The two dogs sitting here are already poor and ignorant

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Simplify -4 + (-3) + 6.
Svetlanka [38]

Answer:3/6 in simplest fraction form is 1/2.

Step-by-step explanation:EASY and my chanel is FireFlameZero if u can check dat out

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