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2 years ago

Which is function? I got them wrong except for 1. I’ll give brainlist :)

Mathematics

2 answers:

ipn [44]2 years ago

8 0

Answer:

The second graph is a function; third one is not

Step-by-step explanation:

Well, you can do the vertical line test. Basically draw a vertical line and see if there are 2 lines intersecting that one vertical line. If it is, it is not a function.

Hope this helps :)

-jp524

Elanso [62]2 years ago

6 0

Answer:

2 is a function and 3 isn't a function

Step-by-step explanation:

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Arte-miy333 [17]

Answer:

Step-by-step explanation:

8 - 72

x - 360

$\frac{360 \times 8}{72} = 40$

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3 years ago

Which is the equation of a hyperbola with directrices at x = ±3 and foci at (4, 0) and (−4, 0)?

Alex Ar [27]

Answer:

$\frac{x^2}{12}-\frac{y^2}{4}=1$

Step-by-step explanation:

Since our foci are located on the x-axis, then our major axis is going to be the horizontal transverse axis of the hyperbola:

<u>Formula for hyperbola with horizontal transverse axis centered at origin</u>

<u /> $\frac{x^2}{a^2}-\frac{y^2}{b^2}=1$
Directrices -> $x=\pm\frac{a^2}{c}$
Foci -> $(\pm c,0)$ where $a^2+b^2=c^2$
$a>b$

Since we are given our directrices of $x=\pm3$ and foci of $(\pm4,0)$ , then we can set up the directrices equation to solve for $a^2$ :

$x=\pm\frac{a^2}{c}\\ \\\pm3=\pm\frac{a^2}{4}\\ \\12=a^2$

Now we can determine $b^2$ to complete our equation for the hyperbola:

$a^2+b^2=c^2\\\\12+b^2=4^2\\\\12+b^2=16\\\\b^2=4$

Therefore, our equation for our hyperbola is $\frac{x^2}{12}-\frac{y^2}{4}=1$

5 0

2 years ago

Write the linear equation in slope-intercept from the information given.

alexandr1967 [171]

Answer:

B) y = -3x+2

Step-by-step explanation:

plug (2,-4) and -3 into y = mx + b to find 'b'

-4 = -3(2) + b

b = -4+6 = 2

4 0

3 years ago

A robot that makes _/6 of a boat per day will make 5 boats in 6 days

MatroZZZ [7]

For what I understand, if a robot was to make 5/6 of a boat per day, in 6 days it will have made 5 boats. The answer is 5

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2 years ago

Which expression is equivalent to (15aºb²c34) (3a166-29cº) for all values of a, b, and

hodyreva [135]

The answer is 45a16c34b27

6 0

2 years ago