2) Today, the price of a pack of pens costs $12. In 2000, the same pack of pens only cost $8. What is the percent of change? 3) In Orlando, Florida the high temperature was 91 degrees on Saturday and on Sunday was 77 degrees. What is the percent of change? 4)Olivia scored 75 points on a math test. On the second math test, she earned 60 points. What is the percent of change?

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The triangles are similar. what is the value of x? show your work.

Graph red beads cost $1 an ounce and gold beads cost $3 an ounce. juanita wants to purchase a 12-ounce mixture of red and gold beads that she can sell for $2 an ounce. the solution of the system shows the number of beads needed for juanita to break even. x + y = 12, x + 3y = 24 how many ounces of red beads will juanita buy to break even? how many ounces of gold beads will she buy?