Answer:
First one and last one
Step-by-step explanation:
9 sq. in because each side is 3 inch and area is length x width. each side is e inch so 3x3=9 sq in.
Answer:
x=20
Step-by-step explanation:
sin¢=cos90-¢
therefore; 3x-15+x+25=90
4x+10=90
4x=90-10=80
x=20
Answer: 7
Step-by-step explanation:
14*1=14
14/2=7
If you simplified a two-equation system and all variables were eliminated, two outcomes are possible.
If the final equation is a true equation, like 3=3, then the system has an <em>infinite number of solutions </em> (the equations graph the same line, and all points appear on both graphs)
If the final solution is a mathematically false equation, like 0=-8, the system has no solution. The lines are parallel and never intersect (have a solution)