Question

The formula f=n/4+37 estimates the temperature F in degrees Fahrenheit when crickets chirp n times per minute. Use the formula to estimate the temperature when n = 18 chirps/min. Round to the nearest whole number, if necessary. 41 42 37 46

Answer 1

$f=\dfrac{n}{4}+37\\\\\text{substitute the value of n = 18 to the expression}\\\\f=\dfrac{18}{4}+37=4.5+37=41.5\approx42$

Answer: f = 42.

Answer 2

By using substitution of value n, temperature F in degree Fahrenheit is 42.

What is substitution method?

"The substitution method is a simple way to solve a system of linear equations algebraically and find the solutions of the variables."

Given

Formula to estimate the temperature F in degree Fahrenheit

f = $\frac{n}{4} +37$

n = 18 chirps/min

Substituting n in the formula

f = $\frac{n}{4} +37$

⇒ f = $\frac{18}{4}+37$

⇒ f = 4.5 + 37

⇒ f = 41.5 ≅ 42 (nearest whole number)

Thus,  temperature F in degree Fahrenheit is 42.

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