30 !
1) the function f(x)=0.11x +43 relates how much derek pays for phone service, f(x), to the number of minutes, x, used for international calls in a month. what is the value and meaning of f(320)?
a) $78.20; this is the amount derek pays for 320 months of service.
b) $78.20; this is the amount derek pays for 320 minutes of international calls.
c) $92.50; this is the amount derek pays for 320 months of service.
d) $92.50; this is the amount derek pays for 320 minutes of international calls.
2) find the ordered pairs for the x- and y-intercepts of the equation 2x-6y=24 and select the appropriate option below.
a) the x-intercept is (2,0); the y-intercept is (0,-6).
b) the x-intercept is (0,2); the y-intercept is (-6,0).
c) the x-intercept is (12,0); the y-intercept is (0,-4).
d) the x-intercept is (0,12); the y-intercept is (-4,0).