Answer:
This is an experiment because a treatment was applied to a group.
Step-by-step explanation:
This is because it cannot be a survey since the children are taking a test, which has a hypothesis. Hope you get this right. I took the test and got right.
Answer:
b.
42+x+90+8=180° linear pair
x=180-140=40°
<em>x=40°</em>
c.
10+x+90+3x=180 linear pair
4x=180-100
x=80/4=20
<em><u>x=20</u></em>°
The mean and standard deviation of the scores are 75 and 9.5 respectively.
The z-score is a means to find the probability of getting a particular score. This is calculated to be:
where x is the score, μ is the mean, and σ is the standard deviation.
To be a part of the top 2.5 percent, the probability is:
The z-score for this probability, that is, P
1.
Make the fractions improper.
72/12 x 19/6 = 19.
2.
Area = L x W
L = 3 1/6 x
W = 6 7/12
= 19.
#1 = 19 feet
#2 = <span>9 3/4 feet</span>
Answer:
C. 40
Step-by-step explanation:
20 + 4x = 180
subtract 20 from both sides
4x = 160
Divide both sides by
x = 40
