Question

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Part 1
Find the numerical value if xequals7 and yequals8.
9​(xplus2​y)

Answer 1

To find the numerical value of the expression \( 9(x + 2y) \) when \( x = 7 \) and \( y = 8 \), follow these steps:

1. Substitute the values of \( x \) and \( y \) into the expression.

\[
x = 7 \quad \text{and} \quad y = 8
\]

2. Calculate \( 2y \):

\[
2y = 2 \times 8 = 16
\]

3. Now, substitute into the expression \( x + 2y \):

\[
x + 2y = 7 + 16 = 23
\]

4. Now multiply by 9:

\[
9(x + 2y) = 9 \times 23 = 207
\]

Thus, the numerical value is **207**.