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Martin has a combination of 33 quarters and dimes worth a total of [tex]\(\$6\)[/tex]. Which system of linear equations can be used to find the number of quarters, [tex]\(q\)[/tex], and the number of dimes, [tex]\(d\)[/tex], Martin has?

A.
[tex]\[
\begin{array}{l}
q + d = 6 \\
25q + 10d = 33
\end{array}
\][/tex]

B.
[tex]\[
\begin{array}{l}
q + d = 6 \\
0.25q + 0.1d = 33
\end{array}
\][/tex]

C.
[tex]\[
q + d = 33 \\
25q + 10d = 6
\][/tex]

D.
[tex]\[
\begin{array}{l}
q + d = 33 \\
0.25q + 0.1d = 6
\end{array}
\][/tex]

Sagot :

GinnyAnsweridn
To solve this problem, we need to create a system of linear equations based on the information provided:

1. Martin has a total of 33 quarters and dimes. This can be expressed as:
[tex]\[ q + d = 33 \][/tex]
where [tex]\( q \)[/tex] represents the number of quarters and [tex]\( d \)[/tex] represents the number of dimes.

2. The total value of these quarters and dimes is [tex]$\$[/tex]6[tex]$. Since one quarter is worth \$[/tex]0.25 and one dime is worth \$0.10, the value equation can be written as:
[tex]\[ 0.25q + 0.1d = 6 \][/tex]

Therefore, the system of linear equations that can be used to find the number of quarters [tex]\( q \)[/tex] and the number of dimes [tex]\( d \)[/tex] is:
[tex]\[ \begin{cases} q + d = 33 \\ 0.25q + 0.1d = 6 \end{cases} \][/tex]

Hence, the correct system of linear equations is:
[tex]\[ \begin{array}{l} q + d = 33 \\ 0.25 q + 0.1 d = 6 \end{array} \][/tex]
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