How to Prepare for the PSAT 10 Math Test?
How to prepare for the PSAT 10 math test, step by step. Each step says what to do and why it works, so you come away with a plan you can follow rather than a list of slogans. PSAT 10 is a standardized test for 10th-grade students that prepares them to take the SAT in […]
Full-Length PSAT 10 Math Practice Test-Answers and Explanations
27- Choice D is correctPercent of cities in the type of pollution A: \(\frac{8}{10}×100=80\%\)Percent of cities in the type of pollution C: \(\frac{7}{10}×100=70\%\)Percent of cities in the type of pollution E: \(\frac{5}{10}×100=50\%\) 28- Choice D is correctLet x be the number of cities that need to be added to the type of pollutions E. Then:\(\frac{x+5}{9}=0.8→x+5=9×0.8→x+5=7.2→x=2.2\) […]
