Step-by-step explanation:
by using similarity and enlargement
10/8 = 7+y/7
70=56+8y
8y=14
y= 7/4
10/8 = 5+x/5
50=40+8x
x = 8/10 = 4/5
Answer:
B
Step-by-step explanation:
Randomly assigned group. the art class isn't random and only consists of a select type of people--it is not a representative sample; maybe more left handed people enjoy art than do right handed people! therefore, even though the randomly assigned group is smaller, it is the better estimate.
There are many solutions. Some are 470 and 6, 471 and 5, 472 and 4.
Answer:
Both (b) and (C) are true.
This study is double blind and the "only spice tea" group serves as the control group.
