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Rainbow [258]
3 years ago
8

In a survey of students , every student studies at least one of the three subjects Maths English and Science . The number of stu

dents who study only one subject is twice the number of students who study only two students . If 20 students study all three and 80 students who study only two subjects, find the total number of students in the survey. ​
Mathematics
1 answer:
Mandarinka [93]3 years ago
5 0

Answer:

80x2=160         20x3=60  160+60=220

Step-by-step explanation:

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artcher [175]

The answer you want would be C.52

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Hope it helps!!


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There are 65 seats on a train. 39 of the seats are empty. What percentage of the seats on the train are empty?
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If <img src="https://tex.z-dn.net/?f=f%28x%29%3Dx%5E2-2" id="TexFormula1" title="f(x)=x^2-2" alt="f(x)=x^2-2" align="absmiddle"
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Answer:

\boxed{f(6) = 34}

Step-by-step explanation:

Composition of functions occurs when we have two functions normally written similar or exactly like f(x) & g(x) - you can have any coefficients to the (x), but the most commonly seen are f(x) and g(x). They are written as either f(g(x)) or (f o g)(x). Because our composition is written as (f \circ g)(2), we are replacing the x values in the g(x) function with 2 and simplifying the expression.

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