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3 years ago

. Which table does NOT show y as a function of x?

Mathematics

1 answer:

maw [93]3 years ago

6 0

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All of the following are equivalent, except_ x(2+1) 3x 2x2 2X+X

irinina [24]

X(2+1) = 2x+x = 3x
3x = 3x
2x^2 = 2x^2
2x+x = 3x

Options 1, 2, and 4 all simplify down to 3x while Option 3 does not. Therefore, the answer is 2x^2

7 0

2 years ago

Jana's best time in a swim race so far is 3.01 minutes. She wants to try to swim the distance 0.02 minute faster. If she is succ

Daniel [21]

Original time is 3.01 minutes.
0.02 minutes faster would be 0.02 less than the original time, so her new time is
3.01min - 0.02min = 2.99 min

8 0

3 years ago

An equation of an ellipse is given. x2 16 + y2 25 = 1 (a) Find the vertices, foci, and eccentricity of the ellipse. vertex (x, y

eimsori [14]

Answer:

(a)

The vertices are at (0,-5) and (0,5).
The coordinates of the foci are (0,-3) and (0,3).
Eccentricity=3/5

(b)Length of the major axis=10

Step-by-step explanation:

When the major axis of an ellipse is parallel to the y-axis.The standard form of the equation of an ellipse is given as:

$\dfrac{x^2}{b^2}+\dfrac{y^2}{a^2}=1$

Given the equation:

$\dfrac{x^2}{16}+\dfrac{y^2}{25}=1$

(I)The coordinates of the vertices are $(0, \pm a)$

$a^2=25\\a^2=5^2\\a=5$

Therefore, the vertices are at (0,-5) and (0,5).

(II)The coordinates of the foci are $(0, \pm c)$ where c^2=a^2-b^2$

$c^2=a^2-b^2\\c^2=25-16\\c^2=9\\c=3$

The coordinates of the foci are (0,-3) and (0,3).

(III)Eccentricity

This is the ratio of the distance c between the center of the ellipse and each focus to the length of the semi major axis.

Simply put, Eccentricity =c/a

Eccentricity=3/5

(b)Length of the major axis

The length of the major axis=2a

=2(5)=10.

4 0

3 years ago

What is the value of x enter your awnser in the box

Llana [10]

Answer:

Step-by-step explanation:ratios

7 0

3 years ago

Write in surd form <img src="https://tex.z-dn.net/?f=%20%7B13%7D%5E%7B%5Cfrac%7B5%7D%7B2%7D%20%7D%20" id="TexFormula1" title=

Airida [17]

Answer:

sqrt(13^2)

Step-by-step explanation:

this is the radical form of 13^(5/2)

6 0

3 years ago

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