3 years ago

What is this lol idk im not sure

Mathematics

1 answer:

julsineya [31]3 years ago

7 0

Answer:

Step-by-step explanation:

If 3x-y=12 then simplifying will give you x - y/3 =4

Since x and y have individual values and neither is an integer, you know that It is D

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Y = −1 / 4 (x + 4) 2 −1 on a coordinate plane using its vertex, focus, and directrix.

trasher [3.6K]

Answer:

Hello,

Step-by-step explanation:

do I remind you of the formula :

where (a,b) is the vertex and y=k the directrix

$y=\dfrac{(x-a)^2}{2(b-k)} +\dfrac{b+k}{2} \\\\\\y=-\dfrac{(x+4)^2}{4} -1 \\\\Using\ identification:\\a=-4\\2(b-k)=-4\\b+k=-2\\\\\left\{\begin{array}{ccc}b-k&=&-2\\b+k&=&-2\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}2b&=&-4\\2k&=&0\\\end{array}\right.\\\\\\\left\{\begin{array}{ccc}b&=&-2\\k&=&0\\\end{array}\right.\\$

Focus=(-4,-2)

Directrix: y=0

Vertex=(-4,-1)

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3 years ago

18/40 reduced to simplest form?

VladimirAG [237]

18/40 divides by 2 is 9/20. So your answer would be 9/20

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3 years ago

Read 2 more answers

Which of the following is equivalent to (8 – 5) ÷ 23 ?

Oksanka [162]

(8 - 5) ÷ 23

= $\frac{(8 - 5)}{23}$

= $\frac{3}{23}$

4 0

3 years ago

What is the inverse function of f(x)= 4- x/6

Westkost [7]

Answer:

$f^{-1}(x) = 6(4-x) = 24-6x$

Step-by-step explanation:

Let $y=f(x)$ and swap x and y:

$x = 4 - \frac{y}{6}$

Then, rearranging for y:

$x+\frac{y}{6} = 4$

$\frac{y}{6}= 4-x$

$y= 6(4-x) = 24-6x$

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3 years ago

Find the surface area of the cylinder in terms of pi.<br><br> Height = 8 in<br> Diameter = 4in

irga5000 [103]

1) the area of the "side" of the cylinder is A1= pi (4 in).
2) the total area of the circular ends of the cyl. is A2 = 2 pi (2 in)^2 (since the radius of the cyl. is 2 in).

The desired total surface area is A = A1 + A2. Keep "pi;" do not substitute a numerical value for "pi."

8 0

3 years ago