Which property explains why these two expressions are equal?

1 answer:

7 0

Re-written, I believe the equation is:

(W+23)+5=W+(23+5)

With this, the parenthesis have nothing multiplying into it, so we can drop the parenthesis to get:

W+23+5=W+23+5
Which is the same thing.

So I'd assume it is the Associative property, because you are combining the like terms of 23 and 5.

Hope this helps!

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In 25 minutes, Jay can run 10 laps around the track. Write an equation to represent the relationship.

Inessa [10]

Answer:

The equation is $y=\frac{2}{5} x$ .

Step-by-step explanation:

Let $y$ represent the number of laps Jay run, and $x$ the number of minutes it takes him to run those laps.

We know that it it takes Jay 25 minutes to run 10 laps; therefore, the number of laps jay runs per minute is:

$\frac{10\:laps}{25\:minutes} =\frac{2}{5}\:laps/min$

So, if Jay runs for $x$ minutes, the number of laps $y$ he will run be:

$\boxed{y=\frac{2}{5}x}$

3 0

3 years ago

Please help I don’t understand it

slavikrds [6]

The constant is 3.

This is because when x=1, y=3 and when x=2, y=6 so that is a constant change over each interval as seen in the graph which is 3 :)

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2 years ago

PLEASE HELP ILL GIVE BRAINLIST <br><br> Write an equation in Standard Form that has roots -4 and 7.

Misha Larkins [42]

Answer:

$x^{2} -3x-28$

Step-by-step explanation:

To find this equation in standard form, first, write it in factored form. This looks like $y=(x+4)(x-7)$ . Then, multiply the polynomials using the FOIL (First, Outside, Inside, Last) method.

Following the FOIL method, you should multiply the first terms in each binomial, $x*x$ , which equals $x^{2}$ .
Then, the outside terms, $x*-7$ . This equals $-7x$ .
Next, the inside terms, $4*x$ $=4x$ .
Finally, the last terms, $4*-7$ , this equals $-28$ .