How much pure acid should be mixed with 6 gallons of a 20% acid solution in order to get a 40% acid solution

#7. m is the midpoint of pq, the diameter of the circle o is 13in. and rm = 4in. find pm find pq

What is the slope-intercept form for each equation in this system? compare the slopes and y-intercepts to describe the graph of the system. 3x - 4y = 28 4x + 10y = 20

Which of the following questions describes the equation g + (-4) = -5? a)what number, when added to negative four, is equal to negative five? b)what number, when added to negative five, is equal to negative four? c)what number, when subtracted from negative four, is equal to negative five? d)what number, when subtracted from negative five, is equal to negative four?