Answer:
No solutions
Step-by-step explanation:
-3x-9=-3x-11
-3x and -3x cancel each other out
-9=-11
False
I recommend getting DESMOS graphing calculator for this sort of problem ;)
Answer: -1.5
Step-by-step explanation:
When population standard deviation is known, then the formula to find the z-test statistic for population mean is given by :-

, where n= Sample size.
= Population mean
= Sample mean
= Population standard deviation.
As per given , we have
(average infants contracted typhoid each month)

n= 4 (No. of months)
Then , the value of the appropriate test statistic will be :




Hence, the value of the test statistic = -1.5
Wait do you need help or no
Answer:
Axioms or postulates are universal truths. They cannot be proved. Theorem are statements which can be proved.
Let the original number be
x
x
×
160
100
=
192
. This indicates an increase of 60%
x
=
192
×
100
160
x
=
120