Sharing your mathematics in MathYouLike

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Lê Huy Quangfollowed a question

23/11/2017 at 15:20

Esme is thinking of two integers. One integer is 4 times the other, and their sum is 18 more than 3 times the smaller integer. What is the smaller of the integers Esme is thinking of?

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23/11/2017 at 15:23

Phân tích các đa thức sau thành nhân tử:

a) $x^{2} - 4 + {(x - 2)}^{2}$ ;

b) $x^{3} - 2 x^{2} + x - x y^{2}$ ;

c) $x^{3} - 4 x^{2} - 12 x + 27$ .

Lê Huy Quangfollowed a question

23/11/2017 at 15:27

A number is randomly selected from the integers 1 through 25, inclusive. What is the probability that the number chosen is divisible by 2, 3, 4 or 5? Express your answer as a common fraction.

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23/11/2017 at 15:25

Right triangle ABC has side lengths 6, 8 and 10 units. Right triangle XYZ, with hypotenuse of length 18 units, is similar to $\Delta$ABC. What is the ratio of the area of $\Delta$ABC to the area of $\Delta$XYZ? Express your answer as a common fraction.