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svet-max [94.6K]
3 years ago
9

I NEED HELP AS SOON AS POSSIBLE

Mathematics
2 answers:
Xelga [282]3 years ago
8 0
The answer is D. 200m = 2cm. That's because to get from meters to centimeters, you need to multiply by 100. 200 * 100 is not 2, therefore D is the answer. 
Margaret [11]3 years ago
5 0
D.
1 cm = 100 meters
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Arrange the parabolas represented by the equations in increasing order with respect to the y-values of their directrixes.
Alexus [3.1K]
(x-h)^2=4P(y-k), vertex is (h,k)
P is distance from vertex to directix
remember to subtract P from the y value of the vertex (p-k) and that y value is the directix, y=p-k

nut
ok so one way is to just graph them on a graphing utility
remember if the graph opens up, then the directix is below that
or we can convert to 4P(y-k)=(x-h)^2 form where P is distance from directix

I will only convert the 1st one fully, you should be able to do the rest

1. y=-x^2+3x+8
multiply both sides by -1 since we don't like the x^2 term negative
-y=x^2-3x-8
add8 to both sides
-y+8=x^2-3x
take 1/2 of linear coeficient and square it and add to both sides
-3/2=-1.5
 (-1.5)^2=2.25
-y+10.25=x^2-3x+2.25
factor perfect square
-y+10.25=(x-1.5)^2
force undistribute -1 in left side
(-1)(y-10.25)=something, we don't care anymore for now
factor out a 4 in -1
4(-1/4)(y-10.25)

k=10.25
p=-1/4=-0.25
directix=k-p=10.25-(-0.25)=10.5
directix is y=10.5

basically completee the square with x and find P by force factoring a 4 out

2.  directix: y=-1.75

3. directix: y=1.5

4. directix: y=17.25

5. d: -37.5

6. d: 9.25

7. d=2.625

order them yourself

7 0
3 years ago
-4004 + 2023 – 24x2 – 2 / – 2x2 + 2x + 1?
Kamila [148]

Answer:

388.5/x

Step-by-step explanation:

multiply:

(-4004+2023-48-2)/ -4 + 2x +1

Simplify:

-2031/ -3 +2x

divide by -3

677/2x

388.5 / x

as simple as you can go

hope this helps!

5 0
3 years ago
For 1.999 × 2.4, how many decimal hops would you move (right to left) to place in your answer?
natali 33 [55]

Answer: 4

Step-by-step explanation: it is 4 because there are a total of 4 different decimal places in the equation so if the equation was 1.2 times 1.2 you would decimal hop 2 times because there are to numbers behind the decimal

5 0
3 years ago
Read 2 more answers
What is the perimeter of a rectangle that is 5.73 feet long and 0.6 feet wide?
sergij07 [2.7K]

Answer:

3.438

Step-by-step explanation:

5.73 × 0.6 = 3.438

3 0
3 years ago
If the graphs of the linear equations in a system are parallel,what does that mean about the possible solution (s) of the system
Black_prince [1.1K]

Answer:

it means that there will be no solution .

<h2><em>hope this helped <3</em></h2><h2><em /></h2>

<em>-bubb0</em>

5 0
3 years ago
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