Answer:
a) ways
b) ways
c) ways
Step-by-step explanation:
Combinatory means combination or arrangement of different elements.
If we have n total elements and we want to find in how many ways we can select x we can use this general formula:
Where
a. How many different ways can four pieces be selected from the 12 colored pieces?
For this case we have:
ways
b. How many different ways can two orange pieces be selected from five orange pieces?
For this case we have:
ways
c. How many different ways can two brown pieces be selected from seven brown pieces?
For this case we have:
ways
<h3>
Answer: Choice B) 122%</h3>
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Work Shown:
A = 1250 is the initial amount
B = 2780 is the new amount
C = percent change = unknown for now
The formula to use is
C = [ (B-A)/A ] * 100
to calculate the percent change.
Basically we calculate the change (B-A) first and then divide that over the original amount A to compute the decimal form of the answer, which is then converted over to percentage form. The "100" tacked on at the end is what converts from decimal to percent form.
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C = [ (B-A)/A ] * 100
C = [ (2780 - 1250)/1250 ] * 100
C = (1530/1250)*100
C = 1.224 * 100
C = 122.4%
C = 122%
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The positive C value indicates we have a percent increase. If C were negative, then we'd have a percent decrease.
Answer:
See below.
Step-by-step explanation:
He borrows 72 dollars from 4 people equally divided. So, he borrows 18 dollars from each person.
If he pays back 3 dollars a week per person, it would take 6 weeks, or about a month and a half, or two, rounding up.
18/3=6.
-hope it helps
Answer:
18+3r
Step-by-step explanation:
-2+5(4+3r)
-2+5×4+3r
-2+20+3r
=18+3r
Answer:
787.5
Step-by-step explanation:
150x21÷4 sana makatolong