Question

precision starting at 1:00 p.m., the temperature changes -4 degrees fahrenheit per hour. write and solve an equation to find how many hours x it will take to reach -1°f. an equation is \\( \square = -1 \\). it will take \\( \square \\) hours to reach -1°f.

Explanation:

Step1: Determine Initial Temperature

From the thermometer, initial temp \( T_0 = 15^\circ\text{F} \).

Step2: Set Up Temperature Change Equation

Temperature change per hour: \( -4^\circ\text{F/hour} \). Let \( x \) = hours. Final temp \( T = -1^\circ\text{F} \).
Equation: \( 15 - 4x = -1 \).

Step3: Solve for \( x \)

Subtract 15: \( -4x = -1 - 15 = -16 \).
Divide by -4: \( x = \frac{-16}{-4} = 4 \).

Answer:

Equation: \( 15 - 4x = -1 \)
Hours: \( 4 \)