The row

The row of shrubs will be 20 feet long. Maya planted three sets of shrubs. One shrub needs to be 7 1/2 feet from the other shrub. How can you use fractions to show how far apart each shrub is from each other?

Correct answer:

x =  26 ¹⁄₄ = 105/4 ft

Step-by-step explanation:

$$\begin{gathered} a=20\text{ft} \\ b=7\frac{1}{2}=7+\frac{1}{2}=\frac{7\cdot 2+1}{2}=\frac{14+1}{2}=\frac{15}{2}=7.5\text{ft} \\ n=3 \\ x=\frac{n\cdot a-b}{n-1}=\frac{3\cdot 20-\frac{15}{2}}{3-1}=\frac{105}{4}\text{ft}=26\frac{1}{4}\text{ft}=26.25\text{ft} \end{gathered}$$

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