To evaluate the expression 3(y – x), it is necessary to determine the values of x and y. Since the sum of the measures of the angles of any triangle is 180 degrees, and a right angle has measure 90 degrees, the value of x can be found by solving the equation x + x + 90 = 180. This yields x = 45. The value of y can be found by solving the equation y + y + y = 180. This yields y = 60. Finally, the values for x and y are substituted into the expression 3(y – x) to obtain 3(60 – 45) = 3(15) = 45.
Difficulty: Medium
Question Type: Standard Multiple Choice
(Mathematics)
Today's ?
Choose the word or set of words that, when inserted in the sentence, best fits the meaning of the sentence as a whole.
The language of Anne Spencer’s poetry conveys an impression of ------- that can be misleading: just when a poem seems to be echoing routine feelings, the diction suddenly sharpens to embody fresh and unexpected ideas.
- frivolity
- triteness
- diversity
- lyricism
- precision
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