Answer:
The Definition of Inverse Operations
A pair of inverse operations is defined as two operations that will be performed on a number or. variable, that always results in the original number or variable. Another way to think of this is. that the two inverse operations “undo” each other.
Example: Addition and subtraction are inverse operations.
Answer:
-15
Step-by-step explanation:
(-9)^2+9/-9+3
81+9/-6
90/-6
-15
Answer:
Value of test statistics = 2.30
Step-by-step explanation:
We are given that for a sample of 35 items from a population for which the standard deviation is 20.5, the sample mean is 458.
Also, Null Hypothesis,
:
= 450
Alternate Hypothesis,
:
450
The test statistics that will be used here is One sample t-test statistics;
T.S. =
~ 
where,
= sample mean = 458
s = sample standard deviation = 20.5
n = sample of items = 35
So, test statistics =
~ 
= 2.30
Therefore, the value of test statistics is 2.30 .
So from 100% you increased it by 30% to become 520
130%=540
percent means parts out of 100
130%=130/100=1.3
1.3 of whole=520
divide both sides by 1.3
whole=400
the number was 400
Answer: The temperature decreased at a rate of 6 C per minute.