All Questions

Find three positive integers such that the product of these numbers is 9  units greater than the sum of these numbers

If n varies directly as m³, and n = 50 when m = 5, find n when m = 60

Let a,b and c be three numbers such that: a= 2^3x3^xx5^2, b=2x3^3x5 and c=280 1*) decompose c into a product of prime factors 2*) find the GCD of b and c 3*) find all possible values of x when LCM (a;b)=2^3x3^3x5^2

1+1=?

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The Question is: Find x is a prime number if 5x+3 is a prime number, too.

I think you are very kind when you help me. 

f(7) = p.77 + q.73 + r.7 - 4 = -p.(-7)7 - q.(-7)3 - r.(-7) - 4

= -[p.(-7)7 + q.(-7)3 + r.(-7)] - 4 = -[f(-7) + 4] - 4

= -(3 + 4) - 4 = -7 - 4 = -11

 2

You have an 8 . First, add four times 8. Next, subtract three times 8. Then, mutiply two times 8. And finally, divide by 8. If we round to the nearest ten, what is the correct number?

A)0                  B)20                   C)40                     D)60                          E)80

In the rectangle ABCD, segement AB is twice segement BC. The perimeter of the rectangle  ABCD  is 60cm. Find the area of the rectangle ABCD?

Convert 2067mm + 478cm - 0,1356m to km.

Let a;b;c\(\in\)R such that a\(\ne\)b\(\\ \ne\)c . Prove that;

\(\dfrac{a^2}{\left(b-c\right)^2}+\dfrac{b^2}{\left(c-a\right)^2}+\dfrac{c^2}{\left(a-b\right)^2}\ge2\)