40+2+1(6+n)
This shows forty plus 2, then 1 times six plus 1 times n.
2 x(3 + 2 x x ) = 54
2(3 + 2x)
6+4x=54
4x = 54-6
4x = 48
4x/4 = 48/4
x = 12
Answer:
40
Step-by-step explanation: I just guesstimated a number and divided 36 by 40 to get .9 which means 90%
Answer:
x=22
Step-by-step explanation:
2(x+5)=3(x-4)
2x+10=3x-12
-x=-22
x=22
Answer:
Paired difference t test
Step-by-step explanation:
The paired difference t test is a type of statistical test which is used to examine if difference exists in th population mean of two samples. The paired difference test usually involves samples taken within subjects. That is, the sample mean for each set of measurement is taken from the Same subject, In the scenario described above, the subjects which are the 6 veteran runners each wore each of the two shoe brands, this means that two readings were produced by each runner ; one reading for brand A and the other brand B.
The difference between the two readings are taken for each runner and used to perform a hypothesis test:
t = μd/ (s/√n)
s = sample standard deviation ; n = sample size ; μd = mean difference
