math
posted by Brandon on .
on 3 tests you earned grades of 88%,94%,and 90%. Each test worth 150 points. The finalo exam is worth 250 points. How many points do you need on the final exam to earn 93% of the total points on tests? What percent do you need on the final?

. 88(150)+.94(150)+.90(150)+x(250)=.93(700)
132+141+135+x(250)=651
408+x(250)=651
x(250)=243
x=.972
Or you need 243points to earn a 97.2 percent