Answer:
41
Step-by-step explanation:
5(4) - 7(-3)
20 + 21 (because it's a negative times a negative and that equals a positive)
41
Answer:
276 papers
Step-by-step explanation:
Make 230 into 10%=23. Multiply 23 by 2 to get 20%. Add that sum (46) to 230, to get how many more papers you graded this week=276.
I think it's;
Ratio of areas = 8:3
Wideness of the the shape = 32 cm
8:3 = 32:X
8/3 = 32/x
x = 8*3/32
= 0.75
Not too sure about the answer
Answer:
<h2>18 hours</h2>
Step-by-step explanation:
This problem is on Combined work rate
Step one:
given data
let the secretary take x hours to finish one job
so the clerical worker will take 2x hours to finish one job.
Both of them working together will take 6 hours
Step two:
The combined work formula is
T/A+T/B=1
Where T= time working together
A= time the Clerical worker spent alone
B= time the secretary spent alone
substituting we have
6/2x+6/x=1
solve for x
6+12/2x=1
18/2x=1
9/x=1
cross multiply
x=9 hours
the clerical worker take 2x hours
2*9= 18 hours
The number of songs that Deante' would have downloaded during month 9 is 58 songs.
<h3>What is a regression line?</h3>
A regression line is a statistical line that best describes the behavior of a data set and such, it is a line that best fits a set of data.
By using Microsoft excel to plot the data on a scatter plot, we can logically deduce that line of best fit for the songs downloaded is given by:
y = 2.03x + 39.7
Thus, the number of songs that Deante' would have downloaded during month 9 is:
y = 2.03(9) + 39.7
y = 18.27 + 39.7
y = 57.97 ≈ 58 songs.
Read more on regression here: brainly.com/question/26059078
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