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9. Write an algebraic expression for 5 times the sum of [tex]$y$[/tex] and 1.

A. [tex]$5 \times (y + 1)$[/tex]

B. [tex][tex]$5 \times y + 1$[/tex][/tex]

C. [tex]$5 \times (y - 1)$[/tex]

D. [tex]$5 \times (5y)$[/tex]

Sagot :

To solve the problem of writing an algebraic expression for "5 times the sum of [tex]\(y\)[/tex] and 1," let's break down the problem step-by-step.

1. Understand the phrase carefully:
- "Sum of [tex]\(y\)[/tex] and 1" tells us to add [tex]\(y\)[/tex] and 1.
- "5 times" means we will multiply this sum by 5.

2. Formulate the expression for the sum:
- The sum of [tex]\(y\)[/tex] and 1 is written as [tex]\(y + 1\)[/tex].

3. Incorporate the multiplication:
- Now, we need to take this sum [tex]\((y + 1)\)[/tex] and multiply it by 5.

Putting these steps together, we get the expression:
[tex]\[ 5 \times (y + 1) \][/tex]

Reviewing the given options:
- A. [tex]\(5 \times (y+1)\)[/tex]
- B. [tex]\(5 \times y + 1\)[/tex]
- C. [tex]\(5 \times (y-1)\)[/tex]
- D. [tex]\(5 \times (5y)\)[/tex]

Option A is the correct answer as it correctly represents "5 times the sum of [tex]\(y\)[/tex] and 1."

Thus, the correct algebraic expression is:
[tex]\[ 5 \times (y + 1) \][/tex]
And the corresponding option is:
[tex]\[ \boxed{A} \][/tex]