Question

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Answer 1

The temperature of a substance in a laboratory beaker dropped thirteen and one-half degrees Fahrenheit from its starting temperature, ending at sixty-eight and three-fourths degrees Fahrenheit. Let s equal the starting temperature. Which mathematical equation could be used to determine the starting temperature of the substance?

s plus thirteen and one-half equals sixty-eight and three-fourths

s plus sixty-eight and three-fourths equals thirteen and one-half

s minus thirteen and one-half equals sixty-eight and three-fourths

s times sixty-eight and three-fourths equals thirteen and one-half

Answer 2

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Answer 3

Letting s be the starting temperature,
"The temperature ... dropped thirteen and one-half degrees Fahrenheit from its starting temperature"
So, \[s-13\frac{1}{2}\]
"...ending at sixty-eight and three-fourths degrees Fahrenheit."
Therefore, the equation you get is\[s-13\frac{1}{2}=68\frac{3}{4}\]
Which one of the choices match that equation?