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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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Step-by-step explanation:

The point-slope form of a line is given by

y - y_1 = m(x - x_1)

where (x_1, y_1) is the point on the line. So we can write the equation as

y - 8 = -\frac{3}{7}(x - 5)

7 0
3 years ago
Juvi is baking oatmeal raisin cookies and fudge brownies! To make 4 batches of brownies, Juvi needs 2/3 of a cup of sugar. She a
dsp73

We can add the fractions together to compare with how much sugar she needs.

\frac{1}{2}+\frac{2}{5}=\frac{5}{10}+\frac{4}{5}=\frac{9}{10}

So Juvi has \frac{9}{10} cups of sugar.

She needs \frac{2}{3} cups, so let's make the denominators the same and compare.

\frac{2}{3}=\frac{20}{30}

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Since \frac{27}{30} > \frac{20}{30}, she has enough sugar to make 4 batches of brownies.

Hope this helps.

頑張って!

3 0
3 years ago
Pretty please help me ❤️pleaaaase
never [62]

Answer:

Sue = 25.75

Dave = 29.5

Tom = 19.75

Sue = s

Tom = t

Dave = d

Step-by-step explanation:

s+t+d = 75

s-6=t

d +16 = s+t

d+16+d= 75

2d = 59

d = 29.5

t = s-6

t+s = 45.5

s-6+s= 45.5

2s = 51.5

s= 25.75

t= 19.75

5 0
3 years ago
Read 2 more answers
The drama club is selling short-sleeved shirts for $5 each, and long-sleeved shirts for $10 each. They hope to sell all of the s
blagie [28]

Answer:

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  • 100 long-sleeved shirts

Step-by-step explanation:

Let S and L represent the numbers of short- and long-sleeved shirts ordered.

The expected earnings were ...

  5S +10L = 1750

The number sold was ...

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We can multiply the first equation by 1/5 and the second equation by 6 to put the equations into standard form:

  • S +2L = 350
  • 2S +3L = 600

Subtracting the second equation from twice the first gives ...

  2(S +2L) -(2S +3L) = 2(350) -(600)

  L = 100 . . . . . . simplify

  2S +3(100) = 600

  S = 150

150 short-sleeved and 100 long-sleeved shirts were ordered.

3 0
3 years ago
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For 0.3937 inch is it better to round to the nearest inch or to the nearest tenth inch? Explain
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It is more appropriate to round to the nearest tenth inch because inches are normally whole numbers and when you are rounding off inches, you want to make sure that your answer is as simplified as possible so it is easier to calculate in the long run.

8 0
3 years ago
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