The equation of a circle is x2 + y2 + 8x – 2y =1. (i) State the coordinbites of its centre and find the exact length of its radius.
(ii) Prove that the point P(-7,4) lies on its circumference.
(iii) Given that PQ is a diameter, determine the coordinates of Q.
(iv) Find the equation of the tangent at the point Q.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

The number of members f(x) in a local swimming club increased by 30% every year over a period of x years. the function below shows the relationship between f(x) and x: f(x) = 10(1.3)xwhich of the following graphs best represents the function? graph of f of x equals 1.3 multiplied by 10 to the power of x graph of exponential function going up from left to right in quadrant 1 through the point 0, 0 and continuing towards infinity graph of f of x equals 10 multiplied by 1.3 to the power of x graph of f of x equals 1.3 to the power of x

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me