The graph f(x)=x2 was transformed to create the graph g(x)=−(x2)2. Which statement describes this transformation?

a reflection over the y-axis and a vertical stretch

a reflection over the x-axis and a horizontal stretch

a reflection over the x-axis and a vertical stretch

a reflection over the y-axis and a horizontal stretch

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

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?