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3 years ago

10

The current in a stream moves at a speed of 8mph. A boat travels 11mi upstream and 11 mi downstream in a total time of 13hr. Wha

t is the speed of the boat in still water?

1 answer:

Roman55 [17]3 years ago

6 0

It would be 8mph because the boat would be carried by the current in still water.

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Mai and Priya were on scooters. Mai traveled 15 meters in 6 seconds. Priya travels 22 meters in 10 seconds. Who was moving faste

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Answer:

Mai was moving faster.

As, she covered a greater distance in the same amount of time.

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Given: Mai traveled 15 meters in 6 seconds and Priya travels 22 meters in 10 second.

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3 years ago

The graph 4x^2-4x-1 is shown. Use the grpah to find the estimates for the solutions of 4x^2-4x-1=0 and 4x^2 - 4x-1=2

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Answer:

a) The estimates for the solutions of $4\cdot x^{2}-4\cdot x -1 = 0$ are $x_{1}\approx -0.25$ and $x_{2} \approx 1.25$ .

b) The estimates for the solutions of $4\cdot x^{2}-4\cdot x -1 = 2$ are $x_{1}\approx -0.5$ and $x_{2} \approx 1.5$

Step-by-step explanation:

From image we get a graphical representation of the second-order polynomial $y = 4\cdot x^{2}-4\cdot x -1$ , where $x$ is related to the horizontal axis of the Cartesian plane, whereas $y$ is related to the vertical axis of this plane. Now we proceed to estimate the solutions for each case:

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b) $4\cdot x^{2}-4\cdot x -1 = 2$

There are two approximate solutions according to the graph, which are marked by red circles in the image attached below:

$x_{1}\approx -0.5$ , $x_{2} \approx 1.5$

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3 years ago

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For this case we have the following quadratic functions:

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Substituting values we have:

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Answer:

An expression that represents the profit is:

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