A thermometer is accurate to ±2°F . Which absolute value equation can be used to find the greatest and least possible temperatures if the thermometer reading is 17°F?

As with rectal measurement sites, tympanic thermometers may give slightly higher readings, with the average temperature around 99.5 °F.

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

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step-by-step explanation:

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