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Molly and Lynn both set aside money weekly for their savings. Molly already has [tex]$\$[/tex]650[tex]$ set aside and adds $[/tex]\[tex]$35$[/tex] each week. Lynn already has [tex]$\$[/tex]825[tex]$ set aside but adds only $[/tex]\[tex]$15$[/tex] each week. Which inequality could they use to determine how many weeks, [tex]$w$[/tex], it will take for Molly's savings to exceed Lynn's savings?

A. [tex]$650 + 35w \ \textgreater \ 825 + 15w$[/tex]

B. [tex]$650 + 95w \ \textless \ 825 + 15w$[/tex]

C. [tex]$650w + 35 \ \textgreater \ 825w + 15$[/tex]

D. [tex]$650w + 35 \ \textless \ 825w + 15$[/tex]


Sagot :

To determine the correct inequality that describes when Molly's savings will exceed Lynn's savings, we need to start by writing expressions for each person's savings after [tex]\(w\)[/tex] weeks.

1. Molly's Savings:
- Initial savings: \[tex]$650 - Weekly addition: \$[/tex]35
- Total savings after [tex]\(w\)[/tex] weeks: [tex]\(650 + 35w\)[/tex]

2. Lynn's Savings:
- Initial savings: \[tex]$825 - Weekly addition: \$[/tex]15
- Total savings after [tex]\(w\)[/tex] weeks: [tex]\(825 + 15w\)[/tex]

We seek the point at which Molly's savings will be greater than Lynn's savings, represented mathematically by:

[tex]\[ 650 + 35w > 825 + 15w \][/tex]

Now let's inspect the provided answer choices:

A. [tex]\(650 + 35w > 825 + 15w\)[/tex]

B. [tex]\(650 + 95w < 825 + 15w\)[/tex]

C. [tex]\(650w + 35 > 825w + 15\)[/tex]

D. [tex]\(650w + 35 < 825w + 15\)[/tex]

Looking at the options above, it's clear that the inequality marking the point where Molly’s savings exceed Lynn's (i.e., option A) correctly represents our derived inequality:

[tex]\[ 650 + 35w > 825 + 15w \][/tex]

Thus, the correct answer is:

[tex]\[ \boxed{A. \, 650+35w>825+15w} \][/tex]