Joaquín invirtió su dinero a 12% y a 15% obteniendo unos intereses de $3000. si las cantidades que invirtió hubieran sido intercambiadas, habría tenido un retorno de $2940. ¿cuánto dinero invirtió a 15%?

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

Which of the following parabolas opens up?