Answer:
He takes minimum 10 hours to make a very large yard .
Step-by-step explanation:
Given
Jack charges a falt fee per yard = $20
Jack charges an additional money per hour = $5
He wants to make sure that he makes at least $70 doing yard work for client by making a very large yard
Let , he takes x hour for making a very large yard
Therefore , we make an inequality
[tex]20+5x\geq 70[/tex]
Subtracting 20 from both side then we get the inequality
[tex]5x\geq 50[/tex]
By simplication we get
[tex]x\geq \frac{50}{5}[/tex]
By dividing we get
[tex]x\geq 10[/tex]
Hence, he takes atleast 10 hours for making a very large yard if he doing yard work and makes atleast $70 .
