If you know the diameter of a circle, which statement describes how to find the area?
a) multiply the diameter by π.
b) square the diameter and multiply by π.
c) divide the diameter in half and multiply by π.
d) divide the diameter in half, square, and multiply by π.

c

Step-by-step explanation:

PI times radius squared

d

Step-by-step explanation: The formula for area of a cicle is a=pi(r^2). I like to remember circumference and area by the sentence cherry pies are delicious, apple pies are too. (c[herry]=pi*d, a[pple]=pi(r^2)

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w