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2 years ago

Someone please help me!!

Mathematics

1 answer:

Brums [2.3K]2 years ago

4 0

I am pretty sure it is D.

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I get see photo. I l ow this is wrong. Can you help?

mylen [45]

Given the equation:

$y=x^2+x-4$

We will find the value of (y) when ( x = 2i )

Note: i² = -1

so, when x = 2i

$y=(2i)^2+(2i)-4$

Simplifying the answer

So,

$\begin{gathered} y=4i^2+2i-4 \\ y=4\cdot(-1)+2i-4 \\ y=-4+2i-4 \\ y=-8+2i \end{gathered}$

So, the answer will be y = -8+2i

8 0

3 months ago

What is the relation between the variables in the equation x=-3/y

Amiraneli [1.4K]

The relation between the variables x and y is inverse. As y increases, the value of x decreases instead. Also, when the value of y decreases, the value of x increases. This variation is called indirect proportion. The opposite is called the direct variation.

8 0

2 years ago

Read 2 more answers

21x - 17x +19 = y<br> Solve for x

Serggg [28]

X= y/21 -2/21
Hope it helps :)

7 0

2 years ago

If f(x) = x2 – 2x, find:<br> f(-3) = [?]

allsm [11]

Answer:

$\boxed{\sf f(-3) = 9}$

Given:

$\sf f(x) = {x}^{2} - 2x$

To Find:

Value of f(x) when x = -3

Step-by-step explanation:

$\sf \implies f(x) = {x}^{2} - 2x \\ \\ \sf \implies f( - 3) = {( - 3)}^{2} - 2 ( - 3) \\ \\ \sf \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 3 - ( - 6) \\ \\ \sf \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: =3 + 6 \\ \\ \sf \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: =9$

5 0

2 years ago

Use the given information to determine the exact trigonometric value. cos theta=2/3,0<∅<90°,sec∅

Elena-2011 [213]

Answer:

Step-by-step explanation:

I think this means you want the secant between 0 and 90 degrees.

The Secant(theta) = 1/Cos(theta)

Cos(theta) = 2/3

1/cos(theta) = 1//2/3 = 3/2

Answer: C

8 0

2 years ago

Read 2 more answers

Someone please help me!!​

Someone please help me!!