There are 20 cassettes.
Step-by-step explanation:
Given,
Ratio of cassette to compact disc = 10:3
Let,
the number of cassettes = 10x
Number of compact disc = 3x
According to given statement;
the number of cassettes is 10 less than 5 times the number of compact discs.
10x = 5(Number of CD) - 10

Dividing both sides by 5

Number of cassettes= 10x = 10(2) = 20
There are 20 cassettes.
Keywords: variable, ratio
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Answer: 9.4
Explanation: 8.4^2+4.3^2=
70.56+18.49=89.06
square root of 89.06 is 9.437
9.4 rounded off
2x+2= 3x-52
Solve for x
You get x to be 54
A) By the rules of secants,
5(x +5) = 6(6 +4)
x + 5 = 12
x = 7
b) 3(3 +5) = 4(x +4)
6 = x +4
2 = x