John bought 7 pens for $12.88. what is the cost of one pen?

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?

Keith runs 5 miles in 38 minutes. at the same rate, how many miles would he run in 57 minutes