All categories

3 years ago

Which equation represents a parabola that has a focus of (0, 0) and a directrix of y = 2?

Mathematics

1 answer:

Genrish500 [490]3 years ago

7 0

Answer: The correct answer is x^2=-4(y-1)

Step-by-step explanation:

Just took the test

You might be interested in

X3 − 6x2 − 7x + 60 = 0

inna [77]

An equation ........

4 0

4 years ago

A. Write 60,000,000 in words.

Vitek1552 [10]

Answer:

The answer is sixty million.

5 0

3 years ago

Alex scored 98,72, and 87 on his first three math test. What must he score on the next test to have an average of at least 86 (P

ss7ja [257]

Answer:

$\huge\boxed{\text{At least an } 87\%}$

Step-by-step explanation:

In order to find what score Alex must earn to have an average of 86 on all his tests, we need to first note what the formula to find the average of a data set is.

$\displaystyle \frac{x_1+x_2+...x_n}{n}$

What the formula means is that we have to add up all the values then divide by the total number of values.

Let's represent our unknown number as $x$ .

$\displaystyle \frac{98+72+87+x}{4} \geq 86$ (since we want AT LEAST an 86).

Let's solve this inequality for x.

$\frac{98+72+87+x}{4} \cdot 4 \geq 86 \cdot 4$
$98+72+87+x \geq 344$
$257 + x \geq 344$
$257 + x - 257 \geq 344 - 257$
$x \geq 87$

So, Alex must score at least an 87% on his next quiz to have an average of 86%.

Hope this helped!

8 0

3 years ago

35 POINTS

dmitriy555 [2]

If the lines are parallel, they have no solutions because they never touch

3 0

3 years ago

Read 2 more answers

Elliott buys a TV. The receipt says that the total of the TV is $252.99, including sales tax. The original price (without tax) o

postnew [5]

Answer:

Step-by-step explanation:

234.25$ : 100 = 252.99$ : x

234.25x = 252.99 x 100

234.25x = 25299

25299 divided by 234.25 is 108

so answer 8%

6 0

3 years ago