18. Find " y " when x = -4.25y = 20x - 16x²

Mathematics

1 answer:

sveta [45]3 years ago

4 0

Answer:

204

Step-by-step explanation:

Plug it into a calculator

20 multiplied by -4.25 then subtracted by 16 times -4.25 squared.

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2. Find the cosine function that is represented in the graph.

Diano4ka-milaya [45]

Answer:

$f(x) = cos(x - \frac{\pi }{4} ) -1$

Step-by-step explanation:

In this graph, we have the coordinate point ( $\frac{\pi }{4} , 0$ ). Without translations, cos(0) = 0, which means that the graph is shifted to the right by $\frac{\pi }{4}$ . We also know that the graph is shifted down by 1 because we have the point

( $\frac{5\pi }{4} , -2$ ), but accounting for the right shift, this point should really by ( $\pi , -2$ ). cos( $\pi$ ) = -1, but on the graph it is -2, meaning that it is shifted down by 1.