What does a correlation coefficient of r = -0.89 indicate? A. A strong negative correlation
B. A weak negative correlation
C. A weak positive correlation
D. A strong positive correlation

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

Acircus act has 3 times as many elephants as acrobats. jorge noticed that all together there were 56 legs in the circus ring. how many elephants were in the show?

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x