Please Help 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 sin(α+β) ?

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sin(α+β) =

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

Which of the following circles have their centers in the third quadrant? check all that apply.

Which method would you use to prove that the two triangles are congruent?