Radius of a circle if area is 64cm

anyone? find the second, fifth, and ninth terms of a sequence where the first term is 65 and the common difference is -7. 72, 93, 121 72, 79, 86 58, 37, 9 58, 51, 44

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29