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Andreyy89
4 years ago
14

Which measure would be used to describe how far a test score is from the average test score?

Mathematics
1 answer:
weeeeeb [17]4 years ago
5 0

Answer:

Standard deviation

Step-by-step explanation:

You use the standard deviation to determine how far the particular mark is further away from the mean. It shows how that particular data point agrees with the mean.

A is wrong

The mean is the average of the data. It does not tell you the information needed in this question.

B is wrong

The mode is just the highest in frequency. It does not say anything about agreeing with the mean

C is wrong

This is wrong and it refers to the middle number in the data set

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Find the simplified form of (t^4/10y^4)^-4
White raven [17]
The answer is [(10,000*y^16)/t^16]. At first, you have to distribute the exponent -4 to the numerator and denominator by virtue of the law of exponent, (a/b)^n = [(a^n)/(b^n)]. After distribution, you get (t^-16)/[(10^-4)*(y^-16)]. To simplify the negative exponent, follow the law of exponent: a^-m = 1/a^m. Thus, you now have [(10^4)*(y^16)]/(t^16). Hence, the answer is [(10,000*y^16)/t^16].
5 0
3 years ago
Graph f(x) = x2 + 2x - 3, label the function’s x-intercepts, y-intercept and vertex with their coordinates. Also draw in and lab
Semenov [28]
<h2>Answer with explanation:</h2>

The given function : f(x)=x^2+2x-3

Using completing the squares, we have

f(x)=x^2+2x+1-1-3        [∵ (x+1)^2=x^2+2x+1]

f(x)=(x+1)^2-4      (1)

Comparing (1) to the standard vertex form f(x)=(x-h)^2+k , the vertex of function is at (h,k)=(-1,-4)

For x-intercept, put f(x)=0 in (1), we get

0=(x+1)^2-4\\\\\Rightarrow\ (x+1)^2=4    

Square root on both sides, we get

x+1=\pm2\\\\x+1=-2\ or\ \ x+1=2\\\\=x=-3\ \ or\ x=1

∴ x intercepts : x= (-3,0) and (1,0)

For y-intercept put x=0 in (1), we get

f(1)=(1)^2-4=1-4=-3  

∴ y intercept : (0,-3)

Axis of symmetry : \dfrac{-b}{2a}

In f(x)=x^2+2x-3 , a=1 and b=2

Axis of symmetry=\dfrac{-2}{2(1)}=-1

5 0
4 years ago
(08.05, 08.06 MC)
babunello [35]

A=16x²-8x+1

16x²-8x+1=l²

(16x²-4x)-(4x+1)=l²

4x(4x-1)-1(4x-1)=l²

x=1/4 or 1

Therefore

since x=1/4

l²=1/4=>l=>√(1/4)

l=1/2

since x=1

l²=1=>l=>√1

l=1

Therefore the length of each sides

1 or 1/2

6 0
3 years ago
My ice chest is at -79 degrees Celsius. What would it convert into Fahrenheit
Ghella [55]

Answer:

it's cold as heck

Step-by-step explanation:

8 0
3 years ago
Need help with this question please for a grade
shutvik [7]
Y = x + 1.75...so we sub in x + 1.75 for y in the other equation

4x - 2y = 4
4x - 2(x + 1.75) = 4....distribute thru the parenthesis
4x - 2x - 3.5 = 4....add 3.5 to both sides
4x - 2x = 4 + 3.5...simplify
2x = 7.5....divide both sides by 2
x = 7.5 / 2
x = 3.75

now we sub in 3.75 for x in either of the original equations to find y.

y = x + 1.75
y = 3.75 + 1.75
y = 5.5

so ur solution is : (3.75,5.5) <==



6 0
4 years ago
Read 2 more answers
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