Answer: A.Kelvin’s because he surveyed people leaving an area where food is sold
Step-by-step explanation:
Given: Kelvin and Lewie each design surveys in order to determine the number of people who buy food at the mall.
Kelvin surveys every other person leaving the food area.
Thus, he doesn't know about the people who do not buy food at mall whereas Lewie surveys every fifth person leaving the mall’s main entrance.
Thus, by this systematic random sampling he knows out of how many people the number of people buy food at mall.
Hence, Kelvin’s survey is likely to produce less valid results because he surveyed people leaving an area where food is sold.
(1) Snow fall in last week =
inches
Snow fall in today=
inches
Let us first change mixed fraction to improper fraction.

Now, make the denominators same.
, 
Now, find the difference between 14/4 and 23/4.
So, compared to last week
more inches of snow fell today.
(2) Given three times a number, minus nine, equals six times six, divided by four.
Let a number be X.
3X – 9 = 6 × 6/4
(3) To solve the equation:
3X – 9 = 6 × 6/4
3X – 9 = 36/4
3X – 9 = 9
3X = 18
X = 6
6( 5 + 8 )
6 * 13 = 78
Your answer is 78.
Hope this helped!
That's a 240 degree sector of a 9 inch radius circle. The whole circle has area πr² and we want 240/360 of it.
A = (240/360) π (9²) = 54 π
Answer: 54 π square inches
That's the exact answer. An approximation is
169.646 square inches
-6t²+t+6
1. Let's group terms like, after eliminating the parentheses.
(3t²+6t+1)+(-9t²-5t+5)
3t²+6t+1-9t²-5t+5
3t²-9t² +6t-5t +5+1
-6t²+t+6
This is the simplest and most convenient form since there' s already a coefficient 1 in term "t".