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3 years ago

What is 2x^2 divided by 2

Mathematics

2 answers:

VikaD [51]3 years ago

5 0

Answer:

x^2 or x²

Step-by-step explanation:

2x^2 divided by 2 is

=2x² / 2

=x²

PtichkaEL [24]3 years ago

4 0

Answer:

the answer is x^2

Step-by-step explanation:

2*x^2÷2=x^2

Hope this helps! :D

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Devaughn is 14 years younger than Sydney. The sum of their ages is 52.What is Sydney's age?

artcher [175]

Set up an equation and solve:
2x-14=52
2x=66
x=33
sydney is 33 and devaughn is 19

5 0

3 years ago

DIscrete Math

Daniel [21]

Answer:

Step-by-step explanation:

As the statement is ‘‘if and only if’’ we need to prove two implications

$f : X \rightarrow Y$ is surjective implies there exists a function $h : Y \rightarrow X$ such that $f\circ h = 1_Y$ .
If there exists a function $h : Y \rightarrow X$ such that $f\circ h = 1_Y$ , then $f : X \rightarrow Y$ is surjective

Let us start by the first implication.

Our hypothesis is that the function $f : X \rightarrow Y$ is surjective. From this we know that for every $y\in Y$ there exist, at least, one $x\in X$ such that $y=f(x)$ .

Now, define the sets $X_y = \{x\in X: y=f(x)\}$ . Notice that the set $X_y$ is the pre-image of the element $y$ . Also, from the fact that $f$ is a function we deduce that $X_{y_1}\cap X_{y_2}=\emptyset$ , and because $f$ the sets $X_y$ are no empty.

From each set $X_y$ choose only one element $x_y$ , and notice that $f(x_y)=y$ .

So, we can define the function $h:Y\rightarrow X$ as $h(y)=x_y$ . It is no difficult to conclude that $f\circ h(y) = f(x_y)=y$ . With this we have that $f\circ h=1_Y$ , and the prove is complete.

Now, let us prove the second implication.

We have that there exists a function $h:Y\rightarrow X$ such that $f\circ h=1_Y$ .

Take an element $y\in Y$ , then $f\circ h(y)=y$ . Now, write $x=h(y)$ and notice that $x\in X$ . Also, with this we have that $f(x)=y$ .

So, for every element $y\in Y$ we have found that an element $x\in X$ (recall that $x=h(y)$ ) such that $y=f(x)$ , which is equivalent to the fact that $f$ is surjective. Therefore, the prove is complete.

3 0

3 years ago

Find the slope of the lines graphed below

Nadusha1986 [10]

Answer:

1. 2

2. -3/5

3. Undefined

Step-by-step explanation:

Using the rise over run method you get 4/2, -3/5, and then for the straight vertical line, its undefined.

8 0

3 years ago