Chen buys 4 notebooks and 3 pens for $17.50 . Liu buys 2 notebooks and 5 pens for $14. Form a pair of simultaneous equations and solve them to find the cost of a notebook and the cost of a pen.
Show your working.

Give all possible names for the line shown. calculation tip: lines can be written with either point first.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 + 4x + 5 = 0

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?