Answer:
- 7
Step-by-step explanation:
Step 1:
8 ÷ 2³ - 16 ÷ 2 Equation
Step 2:
8 ÷ 8 - 16 ÷ 2 Exponents
Step 3:
1 - 16 ÷ 2 Divide
Step 4:
1 - 8 Divide
Answer:
- 7
<u>PEMDAS:</u>
<u>P: Parentheses</u>
<u>E: Exponents</u>
<u>M: Multiplication</u>
<u>D: Division</u>
<u>A: Addition</u>
<u>S: Subtraction</u>
<u></u>
Hope This Helps :)
First combine like terms:
14d+-2d=12d
Then do -84 divided by 12 = -7
D= -7
Answer:
42.8%
Step-by-step explanation:
Step one:
given data
A department store buys 100 shirts at a cost of $700
let us find the cost of 1 shirt
cost of 1 shirt= 700/100= $7 per shirt
The cost price per shirt = $7
We are given that the selling price = $10 per shirt
Step two:
The percent markup can be found as
percent markup= selling-cost price/cost price*100
percent markup= 10-7/10*100
percent markup= 3/7*100
percent markup= 0.428*100
percent markup= 42.8%
Answer:
no error was made
Step-by-step explanation:
5x- 1/5*(20x +5) =9
distribute
5x - 4x-1 = 9
combine like terms
x-1 =9
add 1 to each side
x-1+1 = 9+1
simplify
x = 10
Answer:
a) 0.23
b) The 95% confidence interval for the population proportion is (0.1717, 0.2883).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence level of 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
Point estimate
The point estimate is:
95% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
The lower limit of this interval is:
The upper limit of this interval is:
The 95% confidence interval for the population proportion is (0.1717, 0.2883).
