Answer:
>
Step-by-step explanation:
2/5 is greater than 7/10. Therefore, the best symbol to compare the two would be the greater than symbol, >.
Answer:
(x + y)(p - q)
Step-by-step explanation:
Given
px + py - qx - qy ( factor the first/second and third/fourth terms )
= p(x + y) - q(x + y) ← factor out (x + y) from each term
= (x + y)(p - q)
Answer:
1) C
2) C
3) A
Step-by-step explanation:
1) The right answer is C.
Each volunteer is a pair, consisting of the test of each chair. The difference can be compared for each individual and treated as a paired t-test.
2) The right answer is C.
There is no paired relation between the houses of each sample. There are two independent samples with the same sample size.
3) The right answer is A.
The hours are selected at random, so there is no relation between the hours picked for each worker. There are two indpendent samples with the same sample size.
Let's set up a formula for this, where x is the amount of dvds he started with:
x-45+10=15
x-35=15
+35 +35
x=50
He had 50 DVDs to begin with.
Check
50-45+10
=15
Step-by-step explanation:
2/3 is right and ok then thank
