How many solutions does the system of equations have?
3x+12y=20
y=-1/4x+5/3
a) one
b) two
c) infinitely many
d) none

How do i do this? i don’t understand

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?