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julsineya [31]
3 years ago
6

40 percent of the students at rockledge middle school are musicians. 75 percent of those musicians have to read a sheet music wh

en they play instruments. If 38 of the students can play their instruments whithout reading sheet music, how many students are there at rockledge middle school?
Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
5 0

Answer:


Step-by-step explanation:

40/100 musicians .75*40= 30


30 is to 100

as 38 is to x


30          38

----   =    ------              Cross multiply

100          x


30x=3800

divide by three to get

126 and 2/3

you can't split people, so it would be closer to about 127 students.


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Step-by-step explanation:

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A bag contains 6 red marbles, 6 white marbles, and 4 blue marbles. Find P (red or blue)
AnnyKZ [126]
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Find the value of y for the following system of equations 5x + 3y = 10 x = y - 6
viktelen [127]

Answer:

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Step-by-step explanation:

Solve the following system:

{5 x + 3 y = 10 | (equation 1)

x = y - 6 | (equation 2)

Express the system in standard form:

{5 x + 3 y = 10 | (equation 1)

x - y = -6 | (equation 2)

Subtract 1/5 × (equation 1) from equation 2:

{5 x + 3 y = 10 | (equation 1)

0 x - (8 y)/5 = -8 | (equation 2)

Multiply equation 2 by -5/8:

{5 x + 3 y = 10 | (equation 1)

0 x+y = 5 | (equation 2)

Subtract 3 × (equation 2) from equation 1:

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Divide equation 1 by 5:

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Collect results:

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5 0
3 years ago
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