The graph of the piecewise function is shown.
what is the range of f(x)?
a) { f(x)| –∞ < f(x) < ∞}
b) { f(x)| –∞ < f(x) ≤ 4}
c) { f(x)| 4 < f(x) < ∞}
d) { f(x)| 0 ≤ f(x) < ∞}

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

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove