16. a projectile is thrown directly upward at a velocity of 12.0 m/s. how long does it take for the
projectile to reach its maximum height? (g = 9.8 m/s2)
a. 0.61 s
b. 1.22 s
c. 2.45 s
d. 2.45 s

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Is this a polynomial function? i need to know asap

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.