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worty [1.4K]
3 years ago
9

Need help with these

Mathematics
1 answer:
Alecsey [184]3 years ago
3 0

Answer: OOF

Step-by-step explanation: that looks hard

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[20 points] -x + 4 = 9
sveta [45]

Answer: x = -5

Step-by-step explanation:

-x + 4 = 9

     -4   -4

-x = 5

divide by -1 on both sides

x = -5

4 0
2 years ago
Read 2 more answers
Find the domain of the function. <br><br> y = <img src="https://tex.z-dn.net/?f=%5Csqrt%7Bx%7D%20%2B%201" id="TexFormula1" title
Step2247 [10]

Answer:

[0, infinity)

Step-by-step explanation:

A square root can only use positive numbers, otherwise it becomes imaginary. A function needs to be real to output real values. Therefore, the domain is everything from 0 onwards.

5 0
3 years ago
A parabola can be drawn given a focus of (4,-8) and a directrix of x = -4. What can be said about the parabola?
Pani-rosa [81]

Answer:

It opens to the right and the vertex is at  (0, -8).

The axis of symmetry is y = -8.

Step-by-step explanation:

The vertex is halfway between the directrix and the focus.  

The focus is to the right of the directrix so the curve will open towards the right. The axis of symmetry is the line y = -8.

6 0
3 years ago
Calculat the length of the circumference of a circle with diameter of 8cm.
mr_godi [17]
Hello there!

The formula for finding the circumference of a circle is 2\pir (or 2*3*r in your terms). Although we don't have the radius yet, we can certainly find it pretty easily. Keep in mind that the radius will always be half the diameter. So, let's find the radius.

8 / 2 = 4; now we have everything we need to solve for the circumference.

2*3*4 is our expression. Now let's simplify it.
2 * 3 = 6
6 * 4  = 24

Your circumference is 24cm.

I hope this helps!
7 0
3 years ago
Which expression is equivalent to the given expression?
pogonyaev
That would be D. When you factor out the "x" you get x(13-29)
6 0
3 years ago
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