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ziro4ka [17]
3 years ago
8

If y = x - 4, what is x if y = 7?

Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
4 0
The answer would be that the X=3
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Rapid rental car company charges a $40 rental fee $15 for gas, and $0.25 per mile driven. For the same car, Capital Cars charges
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Sorry for taking so long.  Try typing in the whole question on google you will get lots of websites, it wasn't letting me post any here.

All the websites have $45 for the second sentence, but idk if they could help.

And when you figure it out let me know because it was really bothering me. lol

3 0
3 years ago
Please help will give brainlest<br><br> Question 67x3-34+49x2
tresset_1 [31]

Answer:

265

Step-by-step explanation: Used a Calculator

8 0
3 years ago
Read 2 more answers
Please help me anyone
kotykmax [81]

Answer:

Quelles caractéristiques ces mots ont-ils en commun ? Cliquez sur tout ce qui s'applique.

  • <u><em></em></u>\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]<u><em></em></u>

Step-by-step explanation:

8 0
3 years ago
The directrix of a parabola is x = 4. Its focus is (2,6) .
Sati [7]

Answer:

Step-by-step explanation:

If you plot the directrix and the focus, you can see that the focus is to the left of the directrix.  Since a parabola ALWAYS wraps itself around the focus, our parabola opens sideways, to the left to be specific.  The formula for the parabola that opens to the left is

-(y-k)^2=4p(x-h)

We will solve this for x at the end.  The negative is out front because it opens to the left.  If it opened to the right, it would be positive.

The vertex of a parabola is exactly halfway between the focus and the directrix, so our vertex coordinates h and k are (3, 6). P is defined as the distance between the vertex and the directrix, or the vertex and the focus.  Since the vertex is directly between both the directrix and the focus, each distance is the same.  P = 1.  Filling in what we have now:

-(y-6)^2=4(1)(x-3) which simplifies to

-(y-6)^2=4(x-3)

Now we will solve it for x.

-(y-6)^2=4x-12 and

-(y-6)^2+12=4x so

-\frac{1}{4}(y-6)^2+12=x

4 0
4 years ago
The general form of the equation of a circle is x2 + y2 + 42x + 38y − 47 = 0. The equation of this circle in standard form is .
Readme [11.4K]

Answer:

(-21,-19)

\sqrt{849}

Standard form

Step-by-step explanation:

We are given the equation of circle

x^2+y^2+42x+38y-47=0

General equation of circle:

x^2+y^2+2gx+2fy+c=0

Centre: (-g,-f)

Radius: \sqrt{g^2+f^2-c}

Compare the equation to find f, g and c from the equation

g\rightarrow 21

f\rightarrow 19

c\rightarrow -47

Centre: (-21,-19)

Radius (r) =\sqrt{21^2+19^2+47}=\sqrt{849}

Standard form of circle:

(x+21)^2+(y+19)^2=849

The centre of circle at the point (-21,-19) and its radius is \sqrt{849}.

The general form of the equation of a circle that has the same radius as the above circle is standard form.

4 0
3 years ago
Read 2 more answers
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