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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?

User DuXing
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1 Answer

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Step-by-step 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:


12+6x\le40

Solving for x:


\begin{gathered} 12-12+6x\le40-12 \\ 6x\le28 \\ x\le(28)/(6) \\ x\le4.\bar{6} \end{gathered}

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

User Sandeep K
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