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elena-14-01-66 [18.8K]
3 years ago
8

Dj giovanni is making a playlist for a friend; he is trying to decide what 12 songs to play and in what order they should be pla

yed. if he has his choices narrowed down to 22 country, 11 reggae, and 5 pop songs, and he wants to play an equal number of country, reggae, and pop songs, how many different playlists are possible? express your answer in scientific notation rounding to the hundredths place.
Mathematics
1 answer:
zaharov [31]3 years ago
6 0
It's 3 different types of music and he can only pick 12 songs. So 3÷12=4 . Therefore he can pick 4 songs from each category.
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Apr 17, 1:48:02 AM
galben [10]

Answer:

y = 9.54

and, x = 0.08

Step-by-step explanation:

Given that

x - 2y = -19 .......................(1)

3x + 5y = 48 ...............(2)

Based on the above information

Multiply by 3 in equation 1

So,

3x - 6y = -57

3x + 5y = 48

-     -        -

-11y = -105

y = 9.54

So, the x would be

x - 2(9.54) = -19

x - 19.08 = -19

x = -19 + 19.08

x = 0.08

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Step-by-step explanation:

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2 years ago
Colin invests £100 into his bank account.
kramer

The answer is $131.59

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2 years ago
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two mechanics worked on a car. The first mechanic worked for 10 hours, and the second mechanic worked for 5 hours. Together they
Lerok [7]
Let's make,
mechanic #1's rate = x
mechanic #2's rate = y

* Their rate is dollars per hour ($/hr)

mechanic #1 worked for 20 hours (hr × $/hr = $)
20x = money earned by mech#1

and mechanic #2 worked for 5 hours
5y = money earned by mech#2

together they charged a total of $1150. So the amount of money earned by both mechanics.

20x + 5y = 1150

the sum of the two rates was $95 per hour.

x + y = 95

which means
x = 95 - y

plug (95 - y) in for "x" in the other equation to get everything in terms of one variable.

20(95 - y) + 5y = 1150

solve for y

1900 - 20y + 5y = 1150
1900 - 15y = 1150
-15y = 1150 - 1900
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y = -750/-15
y = 50 $/hr

Now use this to solve for x

x + y = 95
x + 50 = 95
x = 95 - 50
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7 0
3 years ago
Evaluate the expression if a =2.4, b = 0.237, and c =9.49
IRISSAK [1]

Answer:

(0.237)

Step-by-step explanation:

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3 years ago
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