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A bricklayer and an electrician together spend 90 hours working on a new house. If the bricklayer earns $12 per hour, the electrician earns $16 an hour, and the owner pays them a total of $1350 for their work, how many hours does each worker spend on the house?

Determine how many solutions exist: Use either elimination or substitution to find the solutions (if any) - Graph the two lines, labeling the x-intercepts, y-intercepts, and points of intersection: y = 2x + 3 and y = -x - 4

Mark wants to have a semester average of 85 in his math class. The three 6-week grades and the semester exam grade count equally in figuring the semester average in his school. The first six weeks Mark scored 92, the second six weeks he scored 75, and the third six...