Can someone check my work !
(c) set up the following word problem as a proportion and solve. then write your answer as a complete sentence.
a health department estimates that 8 vials of malaria serum will treat 100 people. at this rate, how many vials are required to treat 175 people?

if 8 vials will treat 100 people 8 divided by 100 equals 12.5 the 12.4 divided by 175 equals 14.
so the final answer is 14.

For the equations below which statement is true ? -2x=14 6x=-42

Simplify (8x2 − 1 + 2x3) − (7x3 − 3x2 + 1). −5x3 + 11x2 − 2 5x3 − 11x2 + 2 x3 + 2x2 + x3 x3 − 2x2 − x3

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α. part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part b suppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i.e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part c now try a numerical problem. what is the direction of the vector w = < -1, 6 > ?