Answer:
<u>x = 14</u>
Step-by-step explanation:
4x + (2x + 6) = 90
6x + 6 = 90
subtract both sides by 6:
6x + 6 <em>- 6 </em>=<em> </em>90 <em>- 6</em>
6x = 84
divide both sides by 6
6x/6 = 84/6
x = 14
double check:
4*14 + (2*14 + 6) = 90
56 + 28 + 6 = 90
Have a nice day!
Answer:
148 inches
Step-by-step explanation:
1. You would want to split the rhombus into 4 right triangles.
2. You know two sides of the right triangles (One side would be 12 inches and the other 35) Knowing that you would use the Pythagorean theorem.
3. 35^{2}+12^{2}=c^{2}
4. Solve: 1225 + 144 = 1369
5. The square root of 1369 is 37
6. Multiply 37 x 4 (For all the sides of your triangles)
7. 148 inches
Standard deviation is simply the square root of the variance.
We need to get the square root of each variance to see whether its standard deviation is greater than its variance.
A. 0.25 ⇒ √0.25 = 0.50B. 1.75 ⇒ √1.75 = 1.32C. 2.5 ⇒ √2.5 = 1.58D. 1.5 ⇒ √1.5 = 1.22
Among the choices, only A. 0.25 has a standard deviation that is greater than the variance. The standard deviation is 0.50
Answer:
C) 4/3 = DE/9
Step-by-step explanation:
I don't have much time to explain, so just trust me on this. :)
Answer:
To remove the bias
Step-by-step explanation:
The study in which neither the subject nor the experimenter knows which subject is receiving a particular treatment is known as double blind study.
In the given study, the treatment is caffeine pills. So neither the subjects know they received caffeine pills nor the experimenter knows that which subject received which pill. Hence, this is a double blind study.
Such a study is used to remove the potential bias from the study. For example, if a subject is told that he is given a caffeine pill his actions will re-enforce that he has taken the pill, even in the case when he is given a placebo instead of actual pill. So the belief of the subject may cause bias in the result. This is removed by using the double blind study.
Also, since the experimenter also does not know which subject received the treatment, they won't act in different ways towards different subjects to give away any hints or clue. If the experimenter knows which subjects is given actual treatment, he may behave differently with him. So the double blind study removes this sort of bias as we..