Since C only has two and although it may look like B has three terms, when the letters are joined together like that they are basically just become one big term, so your answer would be A.
The given are:
cost for each blog = $20
cost for each feature article = $60
blog = 10+2(number of articles sold)
total earnings = $700
where,
a = article
b = blog
to solve,
60(a)+20(10+2a)=700
60a+200+40a=700
200+100a=700
100a=700-200
100a=500
a=500/100
a=5
The total feature articles produced last week was 5.
to check,
a+b=700
60(5)+20[10+2(5)]=700
300+20(10+10)=700
300+200+200=700
700=700
Indeed, the number of articles produced last week was 5.
<h3>
Answer: 32</h3>
Explanation:
If a set has n items inside it, then there will be 2^n different subsets. This includes the original set itself (since any set is a subset of itself).
Here we have n = 5 items in the given set, so there are 2^5 = 32 different subsets.
For more information, I recommend looking up the term "power set".
Given that normally distributed data set has a mean of 55 and 99.7% of data fall between 47.5 and 62.5.
Let s be the standard deviation of data set.
Since 99.7% data fall within 3 standard deviations of mean, z-value for 47.5 and 62.5 has an absolute value of 3.
That is |z|=3
But z= 
Let us plugin x=47.5 and mean =55 and equate it to 3.
That is 
Since x is always positive ( being standard deviation), 
Hence 
We will get same value with 62.5 as well.
Hence standard deviation of data set is 2.5.
I’ll look at your recent posts and see if it’s within my abilities to answer them
