The cost of a pen is 3 times the cost of a pencil. The total cost of 8 pencils and 5 pens is $11.50. Please help me to find the costs of a pen and a pencil.

What is the perimeter of square abcd? units units 28 units 37 units

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126

Eis the midpoint of line segment ac and bd also line segment ed is congruent to ec prove that line segment ae is congruent to line segment be