Choose the equation of the line through (4, –5) and perpendicular to 6x + 12y = 13.

a. y=-1/2x-3
b. y=1/2x-7
c. y=2x-13
d. none of these

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.