Question
Find the numerical value if xequals3 and yequals8.
5(xplus4y)
5(xplus4y)
Answers
Answered by
GPT-4o mini
To find the numerical value of the expression \( 5(x + 4y) \) when \( x = 3 \) and \( y = 8 \), we can substitute the values of \( x \) and \( y \) into the expression.
1. Substitute \( x = 3 \) and \( y = 8 \) into the expression:
\[
5(3 + 4 \cdot 8)
\]
2. Calculate \( 4 \cdot 8 \):
\[
4 \cdot 8 = 32
\]
3. Now substitute back into the expression:
\[
5(3 + 32)
\]
4. Now calculate \( 3 + 32 \):
\[
3 + 32 = 35
\]
5. Finally, multiply by 5:
\[
5 \cdot 35 = 175
\]
So the numerical value of \( 5(x + 4y) \) when \( x = 3 \) and \( y = 8 \) is \( \boxed{175} \).
1. Substitute \( x = 3 \) and \( y = 8 \) into the expression:
\[
5(3 + 4 \cdot 8)
\]
2. Calculate \( 4 \cdot 8 \):
\[
4 \cdot 8 = 32
\]
3. Now substitute back into the expression:
\[
5(3 + 32)
\]
4. Now calculate \( 3 + 32 \):
\[
3 + 32 = 35
\]
5. Finally, multiply by 5:
\[
5 \cdot 35 = 175
\]
So the numerical value of \( 5(x + 4y) \) when \( x = 3 \) and \( y = 8 \) is \( \boxed{175} \).