Challenge Question: Here is a system with four linear equations.

x+a=6
x-b=5
x+c=4
x-d=3

what is the value of a+b+c+d

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

The local farm is advertising a special on fresh picked peaches. the farm charges $4.25 to pick your own peck of peaches and $3.50 for each additional peck you pick. write an equation for the total cost of peaches in terms of the number of pecks. deine your variables. how much does it cost to pick 3 pecks of peaches?

Use the drop-down menus to complete the statements to match the information shown by the graph.