1. Since -4 doesn’t equal -2, we will use the first function. All you have to do is plug in -4 to x, and you should get

-3

2. -2=-2, so we will use the second function to get the answer of

3

3. Once again we will be using the first function, so just plug 5 into the answer to get

-7.5

Hope this helped :)

4 0

2 years ago

Kyle pays £720 for the mortgage of his house each month, out of his monthly salary of £1700 .

sesenic [268]

Answer:

About 42%

Step-by-step explanation:

4 0

3 years ago

Which is the graph of the function f(x)= negative square root x

Vsevolod [243]

First, note that $\sqrt{x}$ is always positive (except for x=0), so $-\sqrt{x}$ must be always negative.

Thus, the only plausible graphs are 1 and 3 since they are below the x-axis.

Now, $\sqrt{x}$ and $-\sqrt{x}$ are only defined for x≥0, because only for these x'es we can take the square root.

Note that the third graph has domain (-infinity, 0], so it is not the right one, while 1 is ok.

Answer: first graph

6 0

3 years ago