Question

At the rate shown in the table how many books were sold in 3 weeks

Answer 1

210 books were sold in 3 weeks

Step-by-step explanation

Step 1

you can easily solve this by using a rule of three

number of weeks=1

sold books=70

then, the rate is

`\text{rate}=\frac{70\text{ books}}{1\text{ we}ek}=70\text{ book}s\text{ per w}eek`

Step 2

Let

x represents the number of books sold in 3 weeks,then the rate is

`\text{rate}=\frac{x}{3\text{ w}eeks}`

as the rates are equal

`\begin{gathered} 70=(x)/(3) \\ Multiply\text{ both sides by 3} \\ 70\cdot3=(x)/(3)\cdot3 \\ x=210 \end{gathered}`

I hope this helps you