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cluponka [151]
3 years ago
13

A student has passed 60 percent of the 20 quizzes he has written so far successfully. If the student writes 50 quizzes during th

e year and passes 80 percent of the remaining quizzes successfully, what is the percent of all successful quizzes for the entire year?
PLS HELP QUICK
Mathematics
1 answer:
max2010maxim [7]3 years ago
5 0
We can first find the total number of quizzes and the number he got them right:

Total number: 20+80=100

Total correct answer:
20×60%+50×80%
=52

We can then find the percentage:
\frac{52}{100}  \times 100 \\  = 52

Therefore the answer is 52%.

Hope it helps!
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Wewaii [24]
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6 0
3 years ago
What is the twentieth term of the arithmetic sequence described by the<br> equation an= 3n - 10?
sergij07 [2.7K]

Answer:

The twentieth term is 50.

Step-by-step explanation:

The equation that describes the arithmetic sequence describes it's "general term", which means that all the numbers in that sequence must follow that equation. For instance, if we want to find the first term of the sequence we must make a = 1 and we have:

a1 = 3*1 - 10

a1 = -7

Therefore to find the twentieth term we need to make n equal to 20. This is done below:

a20 = 3*20 - 10

a20 = 60 - 10

a20 = 50

The twentieth term is 50.

8 0
4 years ago
Mitchell was playing a game with a friend and had 797 points. Then, he drew a bad card and lost 625 points. What was his new sco
Semmy [17]

Answer:

172

Step-by-step explanation:

5 0
3 years ago
If I work three hours of day and make $7.25 an hour how much do I make a year
yarga [219]
First of all we are going to take $7.25 and multiply it by 3 here is the math
7.25 x 3 = 21.75
so this means he makes 21.75 dollars a day.
since there are 365 days a year. Now i'm not saying he worked every single day but the question does not say other wise
so we would take 21.75 and multiply it by 365 heres the math
21.75 x 365 = 7,938.75 
this means he makes 7,938.75 dollars a year!!
your welcome 

merry christmas
4 0
3 years ago
(25m + 22) + (9m) = ?​
ehidna [41]

the answer should be 38m+22. hope this helped you!! :)

5 0
3 years ago
Read 2 more answers
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