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3 years ago

Which functions are Invertible Choose each correct answer

Mathematics

2 answers:

BaLLatris [955]3 years ago

4 0

Answer: Top right and top left.

Step-by-step explanation:

For a function to be invertible, we must have that the function is one to one, this is because if we have that the function f(x1) = Y = f(x2)

for the inverse, such that g(f(x1)) = x1

but we know that f(x1) = f(x2)

this means that g(f(x1)) = x2

so g(y) is not a function.

Then, the only functions that can be invertible are the one-to-one functions, the top right, and the top left functions.

Ad libitum [116K]3 years ago

3 0

It is the first two, i just had this on my test :)

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The measure of ∠1 =<br><br> 188<br> 172<br> 94

yanalaym [24]

Answer: Third option is correct.

Step-by-step explanation:

Since we have given that

There is a cyclic quadrilateral.

As we know that "Sum of opposite angles in a cyclic quadrilateral is supplementary.":

so, it becomes,

$86^\circ+\angle 1=180^\circ\\\\\angle 1=180^\circ-86^\circ\\\\\angle 1=94^\circ$

Hence, the measure of ∠1 = 94°

Therefore, Third option is correct.

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3 years ago

When writing a proof, how do you construct the first statement?

Vlad [161]

Answer:c

Step-by-step explanation:

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3 years ago

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I need help with geometry

ankoles [38]

Isn’t that (-1,-1)

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3 years ago

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A segment in the complex plane has a midpoint at –1 + i. If the segment has an endpoint at –5 – 7i, what is the other endpoint?

saul85 [17]

Answer:

Option D. 3 + 9i

Step-by-step explanation:

We know that the formula to find the middle point is:

$(\frac{x_1 + x_2}{2},\frac{z_1 + z_2}{2})$

We know that the middle point is:

$-1 + i$

And the end point $(x_2, z_2)$ is: $-5 -7i$

We wish to find the point $x_1,z_1$

So we can write the following equation

$\frac{x_1 + (-5)}{2} = -1$ (i)

and

$\frac{z_1 + (-7i)}{2} = i$ (ii)

Now we clear $x_1$ from equation (i) and clear $z_1$ from equation (ii)

For equation (i) we have:

$-2 = x_1 -5 \\\\x_1 = 3$

For equation (ii) we have:

$2i = z_1 -7i\\\\z_1 = 9i$

Then the initial point $x_1, z_1$ is: $3 + 9i$

The correct answer is the last option 3 +9i

3 0

3 years ago

What is 2/5 ÷ 4/7 equal to

olchik [2.2K]

When you have to divide a fraction, you have to invert the second fraction (4/7 becomes 7/4), and you then multiply the two fractions.

=2/5 ÷ 4/7
=2/5 * 7/4
Multiply the numerators on top
Multiply the denominators on bottom
=(2*7)/(5*4)
=14/20
Simplify by dividing 2 into top & bottom
=7/10

Hope this helps!! :)

3 0

3 years ago