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Nadusha1986 [10]
2 years ago
12

The equation y=−0.0088x2+0.79x+15 models the speed x (in miles per hour) and average gas mileage y (in miles per gallon) for a v

ehicle. What is the best approximate for the average gas mileage at a speed of 60 miles per hour?
Mathematics
2 answers:
Ber [7]2 years ago
6 0

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:

y = -0.0088x^2+0.79x+15        ,....[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.

⇒x = 60 miles per hour.

Substitute in [1] we have;

y = -0.0088(60)^2+0.79(60)+15      

⇒y = -0.0088(3600)+47.4+15  

⇒y = -31.68+47.4+15

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

rewona [7]2 years ago
5 0
Answer: 30.72 miles per gallon

To find <span>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:

</span><span> y=−0.0088x2+0.79x+15
y= -31.68 +47.4 + 15
y= 30.72
</span>
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