John has invested $6,000,part at 6% simple interest and part at 8% simple interest. If his interest for the year from both investments is $400. The amount invested at 6% is

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

Which inequality is used when the situation involves a “maximum”?