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Makovka662 [10]
2 years ago
7

A college administrator knows that 70% of the students at her college are from out of state, so she decides to make sure that sh

e includes 70 out-of-state students and 30 in-state students in her survey about admission practices at the college. She has a list of all the out-of-state and in-state students currently enrolled at the college. She randomly selects 70 students from the out-of-state list and 30 students from the in-state list. Which sampling method is she using?
Mathematics
1 answer:
AURORKA [14]2 years ago
7 0

Answer:

stratified random sampling

Step-by-step explanation: Hope this Helps PLZ give brainlest :)

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Answer in factored form x^2+11x+7
KATRIN_1 [288]
X² <span>+ 11x + 7

because 7 is a prime number, this doesn't factor prettily. you'll want to use the quadratic formula; if you aren't familiar with it, i'd either research it or look it up in your textbook, because it's clunky and not easily understood in this format:

(-b </span>± √((b)² - 4ac))/(2a)

in your equation x² + 11x + 7 ... a = 1, b = 11, and c = 7. what you do is you take the coefficients of every term, then plug it into your equation:
(-11 ± √((11)² - 4(1)(7))/(2(1))

not pretty, i know. but, regardless, you can simplify it:
(-11 ± √((11)² - 4(1)(7))/(2(1))
(-11 ± √(121 - 28))/2
(-11 ± √93)/2

and you can't simplify it further. -11 isn't divisible by 2, and 93 doesn't have a perfect square that you can take out from beneath the radical. the ± plus/minus symbol indicates that you have 2 answers, so you can write them out separately:

(x - (-11 - √93)/2) and (x + (-11 - √93)/2)

they look confusing, but those are your two factors. they can be simplified just slightly by changing the signs in the middle due to the -11:

(x + (11 + √93)/2) (x - (11 - √93)/2)

and how these would read, just in case the formatting is too confusing for you: x plus the fraction 11 + root 93 divided by 2. the 11s and root 93s are your numerator, 2s are your denominator.
7 0
3 years ago
Why do you have to show your work
swat32
In order to help explain how you came to your answer. It also helps when marking or reviewing because it's easier to find any mistakes
8 0
3 years ago
Read 2 more answers
Suppose 15% of the apples picked one afternoon are rotten.
kow [346]
You answer would be <span>Place 20 equally sized pieces of paper in a hat. Of the 20, 3 read "rotten," and the rest read "not rotten". i just took the test</span>
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3 years ago
Read 2 more answers
I need help asap!!!​
valentina_108 [34]
The answer is (7,6)

This is because a midpoint is in the exact middle, meaning that both sides are an equal distance away. You can find this by fining the difference between the two corresponding coordinates then adding that difference to the midpoint and that will give you your other endpoint.

Hope this helped !!
7 0
2 years ago
A line passes through (2,−7) and (−3,3) . find the slope-intercept form of the equation of the line. then fill in the value of t
ad-work [718]
Slope/m=3-(-7)/-3-2=10/-5=-2
slope/m=-2
y=-2x+b
b=         3=-2*-3+b
               b=-3
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3 years ago
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