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3 years ago

Write the equation of a parabola in conic form with a focus at (-2,-7) and a directrix at y=-1

Mathematics

1 answer:

iren2701 [21]3 years ago

7 0

Answer:

(-2-h)^2+(-7-k)^2=r^2

Step-by-step explanation:

(x-h)^2+(y-k)^2=r^2 this is the normal equation now u just need to substitue those in it

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BLANK + 308 + -126 = 450

fenix001 [56]

Answer:

268

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

If 3x-3+2x-8 what does x equal

My name is Ann [436]

3x + 2x = 5x
-3 - 8 = -11

5x - 11 = 0
5x - 11 (+11) = 0 (+11)
5x = 11
5x/5 = 11/5

x = 11/5

hope this helps

6 0

3 years ago

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Riley and Erik have earned a total of 135 tokens to buy items in the school store. The ratio of the number of tokens that Riley

inysia [295]

There are 72 tokens with Riley and 63 tokens with Erik

<em><u>Solution:</u></em>

Riley and Erik have earned a total of 135 tokens to buy items in the school store

Total number of tokens = 135

The ratio of the number of tokens that Riley had to the number of tokens that Erik has is 8 to 7

Number of tokens with Riley : Number of tokens with Erik = 8 : 7

Let the number of tokens with Riley be 8x

Let the number of tokens with Erik be 7x

Since, Total number of tokens = 135

number of tokens with Riley + number of tokens with Erik = 135

8x + 7x = 135

15x = 135

x = 9

Therefore,

Number of tokens with Riley = 8x = 8(9) = 72

Number of tokens with Erik = 7x = 7(9) = 63

Thus there are 72 tokens with Riley and 63 tokens with Erik

3 0

3 years ago

Can someone help me asap plss

pogonyaev

Answer:

1. 200 inches; 2. 12 feet

Step-by-step explanation:

needed ASAP so i don't want to waste too much time.

5 0

4 years ago

Read 2 more answers

What is the mass, in grams, of a liquid having a density of 1.50 g/ml and a volume of 3.50 liters

valina [46]

Answer:

5250 g

Step-by-step explanation:

Given : Density of liquid is 1.50 g/ml

Volume of liquid is 3.50 liters

Solution :

Since 1 liter = 1000 ml

So, Volume of liquid is 3.50 liters = 3.5*1000 = 3500 ml.

Now $volume = \frac{mass}{density}$

$3500 = \frac{mass}{1.50 }$

$3500 * 1.50=mass$

$5250 g = mass$

Hence , the mass of the liquid is 5250 g.

3 0

3 years ago