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3 years ago

Which survey question is unbiased?

Mathematics

1 answer:

scoundrel [369]3 years ago

3 0

Answer:

Should be a dress code i hope this helps god bless you all

Step-by-step explanation:

You might be interested in

Please help answer this correctly!!! will mark brainliest!!!

AVprozaik [17]

2) B
3)C

I’m not sure If im right but this is what I think it is :)

6 0

3 years ago

Alex has three times as much money as Jennifer. Jennifer has $12 less than Shannon. Together they have $91. How much money does

nevsk [136]

Answer:

The amount of money that Alex has is $47.4

Step-by-step explanation:

Let

x----> amount of money that Alex has

y----> amount of money that Jennifer has

z----> amount of money that Jennifer Shannon has

we know that

x+y+z=91 ----> equation A

x=3y -----> equation B

y=z-12 -----> z=y+12 -----> equation C

substitute equation B and equation C in equation A and solve for y

(3y)+y+(y+12)=91

5y=91-12

y=79/5

y=$15.8

Find the value of x

x=3y ----> x=3(15.8)=$47.4

8 0

3 years ago

For the given expression, use the Commutative Property of Addition to enter an equivalent expression.

Triss [41]

Answer:

x+19=19+x

Step-by-step explanation:

3 0

3 years ago

A cohort study was conducted to study the association of coffee drinking and anxiety in a population-based sample of adults. Amo

azamat

Answer: Relative risk of anxiety associated with coffee use is 5 times the anxiety associated with non coffee use.

Step-by-step explanation:

Since we have given that

Number of coffee drinkers = 10000

Number of whom developed anxiety = 500

Number of non coffee drinkers = 20000

Number of whom developed anxiety = 200

So, probability of getting anxiety from coffee drinkers = $\dfrac{500}{10000}=0.05$

Probability of getting anxiety from non coffee drinkers = $\dfrac{200}{20000}=0.01$

so, Relative risk of anxiety associated with coffee use is given by

$\dfrac{0.05}{0.01}=5$

Hence, Relative risk of anxiety associated with coffee use is 5 times the anxiety associated with non coffee use.

6 0

3 years ago

A parabola can be drawn given a focus of (8, -1)(8,−1) and a directrix of y=-11y=−11. Write the equation of the parabola in any

Sav [38]

Answer:

(x - 8)² = 20(y + 6)

Step-by-step explanation:

The focus of the parabola is (8,-1) and the equation of the directrix is y = - 11.

So, the parabola opens up and the axis of symmetry is x = 8 line.

Now, the axis of symmetry and the directrix meet at the point (8,-11).

So, the vertex of the parabola will be the midpoint of (8,-1) and (8,-11) i.e. (8,-6).

Now, half of the distance between the focus and the directrix is = a = $\frac{11 - 1}{2} = 5$ units.

So, the equation of the parabola in vertex form will be

(x - 8)² = 4 × 5 × (y + 6)

⇒ (x - 8)² = 20(y + 6) (Answer)

6 0

3 years ago