Question

a student can type 15 words per minute. if 12 words have already been typed, how many words will be typed after 4 minutes?
y = 15x + 12
? words

Explanation:

Step1: Identify the value of x

Here, x represents the number of minutes, which is 4.

Step2: Substitute x into the equation

Substitute \( x = 4 \) into the equation \( y = 15x + 12 \).
\( y = 15\times4 + 12 \)

Step3: Calculate the result

First, calculate \( 15\times4 = 60 \), then add 12: \( 60 + 12 = 72 \).

Answer:

72