Angle α lies in quadrant II, and tanα=−12/5 . Angle β lies in quadrant IV, and cosβ=3/5.
What is the exact value of cos(α−β) ?
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cos(α−β) = __

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

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?