*need asap*

the equation x^2 + y^2 - 2x + 7y + 1 = 0
can be rewritten as which of the following equations?

a. (x - 1)^2 + (y - 7/2)^2 = (7/2)^2
b. (x + 1)^2 + (y + 7/2)^2 = (7/2)^2
c. (x + 1)^2 + (y + 7)^2 = 7^2
d. (x - 1)^2 + (y - 7)^2 = 7^2

Chip worked at the animal shelter for 6 hours each week for several weeks. he worked for a total of 42 hours. which of the following can be used to find the number of weeks chip worked at the animal shelter?

You will get 25 points an image of a rectangular prism is shown below: part a: a cross section of the prism is cut with a plane parallel to the base. what is the name of the shape created by the cross section? explain your answer. (5 points) part b: if a cross section of the prism is cut perpendicular to the base, what would be the shape of the resulting cross section? explain your answer. (5 points)

Will give brainliestbased on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m?