A scientist has a 35% solution of HCl (hydrochloric acid) and a 5% solution of HCL. How much of each solution should the scientist use to get 30L of a 20% solution of HCl?

Which math sentence can be used to determine if the triangle is a right triangle?

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

(mc 02.03) what set of reflections and rotations would carry rectangle abcd onto itself? reflect over the y-axis, reflect over the x-axis, rotate 180° rotate 180°, reflect over the x-axis, reflect over the line y=x reflect over the x-axis, rotate 180°, reflect over the x-axis rotate 180, reflect over the y-axis, reflect over the line y=x