6×(1×5)=(6×1)×5
6×5=6×5
30=30
Always do the brackets first.
Follow BEDMAS
B = Brackets
E = Exponent
D = Division
M = multiplication
A = Addition
S = Substruction
Answer:
A whole number
Step-by-step explanation:
An integer is a whole number like 1, 2, 3. It could also be -1, -2, -3, or 0. 9.4 is not an integer. 10 is an integer.
A+a+4+2a-3= 21
combine like terms
1+4a= 21
-1. -1
4a= 20
————
4a. 4
a= 5
Answer: 
Step-by-step explanation:
The confidence interval estimate for the population proportion is given by :-
, where
is the sample proportion of success and ME is the margin of error.
Given : The proportion of computers that were repaired more than three times in the last two years : 
Margin of error : 
Now, the confidence interval estimate for the population mean will be :-

Hence, the 98% confidence interval estimate for the population mean using the Student's t-distribution = 