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AnnZ [28]
2 years ago
9

At a concert 30% of the audience were tennnagers. If there was a total of 1600 audience members, how many of the audience were n

ot teenagers
Mathematics
1 answer:
Misha Larkins [42]2 years ago
5 0

Answer:

Not teenagers = 1120

Step-by-step explanation:

Total number of audience members = 1600

30% of the audience were teenagers.

It means 70% of the audience were not teenagers. It can be given by :

x = 70% of 1600

x=\dfrac{70}{100}\times 1600\\\\x=1120

Hence, 1120 audiences were not teenagers.

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Write the following as an expression: How much water do I need to add to l liters of pure alcohol to obtain a solution of 45% al
vredina [299]

Answer:

see below

Step-by-step explanation:

amount of water w

l liter of pure alcohol = 100% alcohol

solution is 45 % percent alcohol

total amount of fluid is w+l

(w+l)( .45) = l*.100

Distribute

.45w  + .45 l = 1l

.45 w = 1l - .45l

.45 w = .55l

w = .55l / .45

w =11/9 l

3 0
3 years ago
What is the domain and range of y=-1/4(x)
LenKa [72]

Domain: (-\infty, \infty)

Range: (-\infty, \infty)

Explanation:

The function is y=-\frac{1}{4} x

The domain of a function is the set of all input values for which the function is well defined. Generally, domain consists of all x-values of the function. Hence, the function y=-\frac{1}{4} x is defined in the interval (-\infty, \infty).

The range of a function is the set of output values obtained by substituting the value of x in the function. Hence, the function y=-\frac{1}{4} x is defined in the interval (-\infty, \infty).

6 0
3 years ago
Can anyone help me with this math please
aliya0001 [1]
What grade are you in
3 0
3 years ago
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dexar [7]

Answer:

yeah its A

Step-by-step explanation:

ok

7 0
3 years ago
How many fifths are the in 60/100
tankabanditka [31]
In order to calculate that, we need to divide it by 1/5 as follows:
60/100 / 1/5

We can re-write it as: 60/100 * 5 = 6/10 * 5 = 30/10 = 3

So, there are "3" 1/5ths in 60/100

Hope this helps!
8 0
3 years ago
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