Using the following equation, please find the center and radius of the circle. I would greatly appreciate if you showed your work. Cheers! :) x^2 − 4x + y^2 + 8y = −4

Find the value of x for which abcd must be a parallelogram -9-6x x-30

Need to finish my juan wants to build a greenhouse in his back yard. he needs to maximize the ratio of floor area to structure volume in order to provide the most room for plants while minimizing the area to be heated. find the description of the structure that best meets juan’s criteria. a.) a hemisphere with a diameter of 12 feet b.) a cube with a side length of 12 feet c.) a cone with a diameter of 12 feet and a height of 10 feet d.) a square pyramid with a base side length of 12 feet and a height of 9 feet

Find two numbers if their ratio is 4: 7 and their difference is 123.