If y varies inversely as x^2 and y = 3 when x = 18, what is y when x = 3? a. 6 b .108 c.54 d.27 select the best answer from the choices provided abcd

It is given in the question that

y varies inversely as x^2 and y = 3 when x = 18.

SInce y varies inversely as square of x, so the formula will be

Where k is the constant of proportionality .

Substituting the values of y and x, we will get

Multiplying both sides by 324,

So the equation will be

And when x equals 3, we will get

Therefore the correct option is B .

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

1. d.90

2. e. none of these (80)

3. a. 0

4. b. 6

5. e. none of these (10)

6. a. 5