Lines 3x-10 and 5x+30 are parallel what is the value of x

The slope of a line is -1/2 . what is the slope of a line that is parallel to it? a. 1/2 b.2 c. -1/2 d. -2

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?