Derive the equation of the parabola with a focus at (2, 4) and a directrix of y = 8

Answer:

Obtuse

Step-by-step explanation:

Answer: scalene, and obtuse

Step-by-step explanation: All of the sides are different lengths so that makes it a scalene triangle. On the picture it also shows that one of the angles is 107 degrees. Since 107 is larger than 90, it is an obtuse triangle.

Answer:

Volume of a cylinder, V = πr^2h

but r= d/2

therefore, Vol = π(d/2)^2h

from the parameters given,

Vol = π(18/2)^2h

=81πh

Answer:

Step-by-step explanation:

Fist you add -13 to 6y and than 4x that should be 69420

Answer:

the cube root of 262144 is 512

Answer:

64

Step-by-step explanation:

The cube root of 262144 is 64

Answer: y=4x-2

Step-by-step explanation:

Since you are looking for y-intercept, the point has to be on the vertical line and the slope is 4 so it has to go up 4 to the right 1

Answer:

Y=4x-3

Explanation: If we look 2 = 5 We can do 4(2)= 8 -3 = 5 So that the answer and 4(4)= 16-3 = 13 so these are the Y so this is the answer!

Answer:

y=-2x+5; slope is -2

Step-by-step explanation:

slope is rise/run. we can see it rises 2 and goes left one which would give us rise/run=2/-1=-2. that is our slope.

using y=mx+b to write the equation, m is slope and b is the y-int.. we can see that the y-int. is (0,5). we can plug 5 into b.

plugging b and m in we can get the equation: y=-2x+5

Answer:

a- 130, 130, and 50

b- 7 and 10

Answer:

a- 130, 130, and 50

b- 7 and 10

Step-by-step explanation:

Answer:

x equals to -1

Step-by-step explanation:

x-4x :3

-3x : 3

so x: -1

Answer:

x is the element of {-4,-3,-2,-1,0,1,2,3,4}

Answer:

2.89949493661

Step-by-step explanation:

Hope i helped! Have a wondeful weekend! :)

Answer: 2.899494936610

Step-by-step explanation:

Answer:

x=-10

Step-by-step explanation:

Answer:

He burrows 6 holes in 2 minutes which means that he can burrow 3 holes in 1 minute.

To determine how many he can burrow in 7 minutes, you would multiply the

unit rate of 3 holes in 1 minute by 7.

He would burrow 21 holes in 7 minutes.

Step-by-step explanation:

brainliest pls?

Answer:

He burrows 6 holes in 2 minutes which means that he can burrow 3 holes in 1 minute.

therfore your answer would be 21 holes in 7 minutes

Step-by-step explanation:

Answer:

A: Quadrant IV

B. Quadrant III

Step-by-step explanation:

Quadrant IV is the bottom right

Quadrant III is the bottom left

Answer:

the answer is 7$

Step-by-step explanation:

I used a percentage app

Answer: a

Step-by-step explanation:

multiply each answer by 10

Answer:

3a^3

Step-by-step explanation:

Ok I got you bud now the the first thing to notice that they're all the same variable. so the way I learned to look at is like this  

1a^2 x 3a^1

so the reason I put it like this is so I remember that in front of every variable is a coefficient. so you would first multiply the coefficient

3x1=3

3

then multiply the a's you have one a that is being squared and one a to the first power so since your multiplying them you just add the exponents

a^1 + a^2 = a^3

so when you put it all together it says 3a^3

hope this helps

Answer:

172.5

Step-by-step explanation:

The formula for the surface area of a right circular cone (the following shape) is πr( r + √h^2 + r^2). Since the radius (r) is already given (3) and the height (h) is already given (15), you just replace each r with 3 and h with 15. After solving this out, you should get 172.45, which rounds to 172.5 to the first decimal place

Answer:

Slope = [tex]\frac{1}{3}[/tex]

Step-by-step explanation:

Write the equation in y =mx + c form

3x - 9y = 4

    -9y = -3x + 4

       [tex]y = \frac{-3x}{-9}+ \frac{4}{-9}\\\\y =\frac{x}{3} - \frac{4}{9}\\m = \frac{1}{3}[/tex]

Answer:

The answer is y= 3/5x+7/5

Answer:

Here u go! :)

Step-by-step explanation:

10:20, 15:25, 20:30 etc..

Hope this helps you! xx

Answer:

10:20, 15:30, 20:40, 25:50

Step-by-step explanation:

Answer:

Volume of pyramid with square base is 1057.54 m³

Step-by-step explanation:

We are given:

Length of base of pyramid = 14.4 m

Height of pyramid = 15.3 m

We need to find:

Volume of pyramid with square base

The formula used is: [tex]Volume=\frac{1}{3}\times a^2 \times h[/tex]

Where a = base of pyramid and h is height

Putting values and finding volume

[tex]Volume=\frac{1}{3}\times a^2 \times h\\Volume=\frac{1}{3}\times (14.4)^2 \times (15.3)\\Volume=\frac{1}{3}\times 207.36 \times 15.3\\Volume=1057.54 \ m^3[/tex]

So, Volume of pyramid with square base is 1057.54 m³

Answer:

1057.5

Step-by-step explanation:

Answer:

11x + 8 +8x +12 =27  (drop the parenthesis, there's no actual need for them)

19x +20 =27 (i combined like terms and then subtracted 20 from both sides)

19x = 7  (divide both sides by 19 to get x alone)

x= 7/19 or 0.36842105 (the answer)

Step-by-step explanation:

Answer: m∠T = 48°

ΔMAT has MA = MT

=> ΔMAT is a isosceles triangle at M

=> ∠A = ∠T = (180° - ∠M)/2

=> x + 20  = (180 - 3x)/2

⇔ 2x + 40 = 180 - 3x

⇔ 5x = 140

⇔ x = 140/5

⇔ x = 28

=> ∠A = ∠T = 28 + 20 = 48°

Step-by-step explanation:

Answer:

Part B= (7.5 years, 2.25ish dollars) or about (7,2)

Step-by-step explanation:

im sorry i couldn't answer part b

Answer:

x+y=3;  graph is in word doc

Step-by-step explanation:

Answer:

B.

Hope this helps!

Answer:

[tex]B.Alternate\ Exterior\ Angles[/tex]

Step-by-step explanation:

[tex]As\ the\ exterior\ angles\ lie\ on\ the\ opposite\ sides\ of\ the\ transversal,\\that\ cuts\ two\ parallel\ lines,\ the\ set\ of\ 'Alternate\ Exterior\ Angles'\ formed\\are\ equal.[/tex]

Step-by-step explanation:

The line A, the slope is +2

And line B the slope is n-1

Answer:

For A;

x1 = -2, y1 = -3, x2 = 3, y2 = 7

Gradient = (y2 - y1)/(x2 - x1)

= (7 - (-3))/(3 - (-2))

= 10/5 = 2.

For B;

x1 = 7, y1 = -2, x2 = -2, y2 = 7

Gradient = (y2 - y1)/(x2 - x1)

= (7 - (-2))/(-2 - 7)

= 9/-9 = -1.

Answer:

X= -3

Step-by-step explanation: