For this problem, you kind of have to work backwards. The first step is figuring out what percentage of 900 is 225--this way we can find out what percentage we need to take from the sample of 48. In order to find the percentage:
225 / 900 = 0.25 or 25% < this is the percentage of students the administrator predicts will be in favor of the dress code. Now we can assume that this means 25% of the original 48 asked were in favor.
So now, we need to find 25% of 48:
48 x 0.25 = 12 < this is the number of students out of the original 48 who were in favor of the new dress code.
Answer: 12 students
7.5 it's is hat answer or if I'm wrong use photomath it's the best app
Answer:
zeros are ±2
Step-by-step explanation:
y = x² - 4
this can be factored into (x+2)(x-2)
if you then set each factor equal to zero you will get zeros of ±2
To convert a quadratic<span> from y = ax</span>2<span> + bx + c </span>form<span> to </span>vertex form, y = a(x - h)2+ k, you use the process of completing the square. Let's see an example. Convert y = 2x2<span> - 4x + 5 into</span>vertex form<span>, and state the </span>vertex<span>.
Mark me as brainliest if I helped:)</span>
a )
First of all we need to find the value of x ,
because the angles are written in terms of the variable x .
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<h2>Let's find the value of
x :</h2>
STV angle & SUV angle have same measure because both of them are the front angle of SV arc .
So :
Add sides 5
Subtract sides minus 2x
Collect like terms
Thus the measure of angle T equals :
Now just need to put the value of x which we found :
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b )
angle S & angle V are also have same measure because they both are the front angles to the TU arc .
And we need to find the value of x again in this part exactly like we did for a .
As the question told :
and ,
Thus :
Subtract sides minus x
Collect like terms
Divide sides by 2
Simplification
So ;
And we're done.