Full-Length PSAT 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 pollution E. Then:\(\frac{x+5}{9}=0.8→x+5=9×0.8→x+5=7.2→x=2.2\) […]
Full-Length PSAT Math Practice Test
A. \(\frac{5}{39}\) B. \(\frac{6}{39}\) C. \(\frac{6}{13}\) D. \(\frac{5}{6}\) 9- If a parabola with equation \(y=ax^2+6x+16\), where a is constant, passes through point \((-2, 8)\), what is the value of \(a^2\)? A. 1 B. 2 C. 3 D. 4 10- If \(a, b\) and c are positive integers and \(4a=6b=10c\), then the value of \(2a+3b-4c\) is […]
![10 Most Common GED Math Questions [Updated for 2026]](https://www.effortlessmath.com/wp-content/uploads/2020/08/10-Most-GED-Math-Questions-COVER-512x240.jpg)
