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18. Maddie has no more than $40 to spend at the store on new paint and paintbrushes for her art project. Paintbrushes cost $3 each and paint colors are sold for $6 each. If Maddie buys 4 paintbrushes, how many new paint colors can she afford?

Sagot :

Explanation:

Let 'x' be the number of paint colors Maddie can buy.

She buys 4 paintbrushes that cost $3 each. This means that she already spent 4x3=$12 in paintbrushes. This amount plus the amount of money she'll spend in the paint colors must be at most $40:

[tex]12+6x\le40[/tex]

Solving for x:

[tex]\begin{gathered} 12-12+6x\le40-12 \\ 6x\le28 \\ x\le\frac{28}{6} \\ x\le4.\bar{6} \end{gathered}[/tex]

Since x must be a whole number (is the amount of paint colors) and it has to be less than 4.666... then Maddie can afford 4 paint colors

Answer:

Maddie can afford 4 paint colors

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