The temperature is -2°C. If the temperature rises by 15°C, what is the new temperature?

What must be true of two rational expressions before they can be added?

VladimirAG [237]

Answer:

They most have common denominators.

Step-by-step explanation:

Let the following two rational expressions:

$\frac{p}{a} , \frac{q}{b}$

where p,a,q, b are integers, a and b the denominators are not 0, i.e. $a,b\neq 0$

We can add rational expressions only if their denominator is same.

That is why we find LCD to be $ab$ .

Then,

$\frac{p}{a} +\frac{q}{b} =\frac{pb+qa}{ab}$

Let the following two rational expressions:

$\frac{p}{a} , \frac{q}{b}$

where p,a,q, b are integers, a and b the denominators are not 0, i.e. $a,b\neq 0$

We can add rational expressions only if their denominator is same.

That is why we find LCD to be $ab$ .

Then,

$\frac{p}{a} +\frac{q}{b} =\frac{pb+qa}{ab}$

So, the correct answer is the last option that we can sum rational expressions if they have common denominator.

3 0

4 years ago

Sending 12 dollars Paypal to People who Only get this right (I MADE IT SO IM WATCHING TO SEE WHO GETS IT CORRECT) :D GOOD LUCK

11111nata11111 [884]

Answer:

Answer # 1 and answer #4

Step-by-step explanation:

If line XY is a bisector, it divided the line YW in half, therefore making ZY equal to ZW

Euclids 1st book proposition 13 states that a line standing on another line makes 2 right angles. therefore <YZW is a right angle because that angle plus <WZX must be equal to 180 and line YW splits the angles in half

4 0

3 years ago

The price of a train ticket consists of an initial fee of $5 plus a fee of $2.75per stop

mamaluj [8]

The complete question describes the use of word problems to represent inequalities. The $21 means that there is a limit to the number of stops she can take using the train.

The inequality that represents this scenario is:

$5 + 2.75x \le 21$

From the complete question, we have the following parameters:

Initial Fee = $5

Rate per stop = $2.75

Amount = $21

The inequality that represents the scenario is as follows:

Initial Fee + Rate * Number of stops <= Amount

We use <= because the total charges must not exceed the amount.

Let the number of stops be x.

The above formula becomes

$5 + 2.75 * x \le 21$

$5 + 2.75x \le 21$

Read more at:

brainly.com/question/16061085

7 0

3 years ago

Read 2 more answers

Find the area of the trapezoid using the formula using the A=1/2h(b1+b2)

pentagon [3]

Answer:

9

Step-by-step explanation:

1/2 bh (b1+b2)
Count all the squares for the base (6 squares)
Half it bc 1/2bh, which is not 3(h)
Now count the amount of squares to the top of it from the bottom (3 as well)
Now the problem is 3(3) which is 9.
So, the answer is 9

Hope this helps! Comment on it if you need more explanation!:)

4 0

3 years ago

The Mendes family bought a new house 11 years ago for $100,000. The house is now worth $196,000. Assuming a steady rate of growt

77julia77 [94]

The appreciation rate would be 6.31% per year.

5 0

3 years ago