Answer:
4h + 100
Step-by-step explanation:
h = total number of hats
postcards = 2h
magnets = h + 100
Add them all together:
h + 2h + h + 100 = 4h +100
1) A. Biased because the population could be uneven. Too many of one ethnicity, too many of one gender, etc.
2) I believe this one is C. because there are not enough people. You need to survey the majority of parents instead of a selected few.
3) There are 80 green marbles per 500, therefore calculate the percentage.

or

percent. Multiply

percent or

times 25. It gives you

.
4) This one is a probability thing too. For every 500 batteries, there are 3 that are defective, therefore,

.

5) Yet another one. Add up all the nuts and you get

. The chance of getting a cashew from these

is:

.
Therefore:
Answer:
x=
3
5
+
1
5
√149 or x=
3
5
+
−1
5
√149
Answer:
(-∞, ∞) = domain
(-∞, 12] = range
Explanation:
Find the domain by finding where the function is defined. The range is the set of values that correspond with the domain.
Hope this helps! :)
You must do work presented inside parentheses first. Thus, do this first: (-5-7).