On sunday, a local hamburger shop sold a combined total of 261 hamburgers and cheeseburgers. the number of cheeseburgers sold was two times the number of hamburgers sold. how many hamburgers were sold on sunday?

Since there were 2 cheeseburgers for every 1 hamburger, the total number of hamburgers is 1/3 the total number of burgers sold.

... hamburgers = 1/3·261 = 87

87 hamburgers were sold on Sunday

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

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step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse