Question

determine the value of y, if x is 144.
y = \sqrt{x} - 5
answer

Explanation:

Step1: Substitute x = 144 into the formula

We have the formula \( y = \sqrt{x} - 5 \), and we know that \( x = 144 \). So we substitute \( x \) with 144 in the formula, getting \( y = \sqrt{144} - 5 \).

Step2: Calculate the square root of 144

The square root of 144 is 12, because \( 12\times12 = 144 \). So now the formula becomes \( y = 12 - 5 \).

Step3: Perform the subtraction

Subtract 5 from 12: \( 12 - 5 = 7 \).

Answer:

7