Trisha's desktop is a quadrilateral. Three of the angles are 77°, 80°, and 85°.

What is the measure of the fourth angle?

A.

58°

B.

158°

C.

118°

D.

258°

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What is her change in elevation after 5 Hours

14 karat gold is a mixture of pure gold and other metals. One ounce of 14 karat gold weighs 0.58 ounce of pure gold. If a 14 karat gold necklace weighs 1.8 ounces, how many ounces of pure gold does it contain?

Meg withdrew $300 from her account on Saturday. Then she deposited $174.83 into her account on Sunday. Meg wants to know how much her account balance changed as a result of these two transactions.

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