Respuesta :
Answer: 30.72 miles per gallon
To find best approximate for the average gas mileage at a speed of 60 miles per hour you need to replace the variable x with 60. The calculation would be:
y=−0.0088x2+0.79x+15
y= -31.68 +47.4 + 15
y= 30.72
To find best approximate for the average gas mileage at a speed of 60 miles per hour you need to replace the variable x with 60. The calculation would be:
y=−0.0088x2+0.79x+15
y= -31.68 +47.4 + 15
y= 30.72
Answer:
30.72 miles per gallon is the best approximate for the average gas mileage at a speed of 60 miles per hour
Step-by-step explanation:
Given the equation:
[tex]y = -0.0088x^2+0.79x+15[/tex] ,....[1]
where,
y is the average gas mileage (in miles per gallon)
x is the speed (in miles per hour)
We have to find the the average gas mileage at a speed of 60 miles per hour.
⇒[tex]x = 60[/tex] miles per hour.
Substitute in [1] we have;
[tex]y = -0.0088(60)^2+0.79(60)+15[/tex]
⇒[tex]y = -0.0088(3600)+47.4+15[/tex]
⇒[tex]y = -31.68+47.4+15[/tex]
Simplify:
y = 30.72 miles per gallon
Therefore, the best approximate for the average gas mileage at a speed of 60 miles per hour is, 30.72 miles per gallon
