Answer:
We conclude that eighty percent of bike tires last at most 14.4 months.
Step-by-step explanation:
We know that a pair of bike tires can last 18 months if used every day.
We calculate how much eighty percent of the tire will last in months.
We have the following proportion:
We conclude that eighty percent of bike tires last at most 14.4 months.
Answer:
for all values of x
Step-by-step explanation:
we got
y = y so for all values of x the equation is true
30 miles/hour * x hours= 40 miles/hour * (x-4) hours
Distribute the 40, so you get
30x=40x-160
Subtract 40x from both sides
-10x=-160
Divide both sides by -10
x=16
They drove 16 miles
Domain asks for any restrictions on the x-value and the range asks for any restrictions on the y-value.
Let's tackle this one at a time.
Domain: We're dealing with a quadratic function or a parabola, so usually there wouldn't be any restrictions on the x-value. When you graph out this parabola, you can see that the x-values will continue to grow to infinite and negative infinite.
Hence, there are no restrictions for the domain, and it would be all real values.
Range: Now, based on the graph, there is definitely a point at where the graph doesn't exist anymore. For a concave up or down, the range would always be greater or less than the x-value of the vertex. In this case, we have a concave up parabola, and as such, we would have a y-value that exists for when y ≥ -3
