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3 years ago

How do you subtract rational expressions without a common denominator?

1 answer:

4 0

You would have to make common denominators
consider a/b,c/d in Q
then a/b - c/d = ad/db - cb/bd = (ad-cb)/db for all a,b,c,d in R, exclude b,d=0
i.e. 1/2 - 1/4
=4/8 - 2/8 =(4-2)/8=2/8 =1/4

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The bakers at Healthy Bakery can make 270 bagels in 5 hours. How many bagels can they bake in 18 hours?

alekssr [168]

972 bagels the third one

3 0

3 years ago

Nancy sold 18 fewer boxes than Lucas. How many boxes did Lucas sell?

Jet001 [13]

This question is incomplete. Here is the complete question:

Nancy have sold 19 box in total. Nancy sold 18 fewer boxes than Lucas,

How many boxes did Lucas sell?

Answer:

The correct answer is 37.

Step-by-step explanation:

First we must analyze the data we have.

We know that the total number of boxes sold by Nancy is 19.

We know that Nancy sold 18 boxes less than Lucas.

But we don't know how many boxes Lucas sold, so we'll assign an x.

Now, knowing that Nancy sold 18 boxes less than Lucas, and that 19 is the total, the equation will be as follows:

x-18 = 19

The next thing we should do is try to make the term x remain alone, therefore we must move the -18, always remembering that a sum or a subtraction <u>passes to the other side with the opposite sign.</u> Then it will be:

x = 19 + 18

Then we solve the operation:

x = 37

In this way the variable x already has a result that is 37.

Therefore the correct answer is that Lucas sold 37 boxes.

6 0

4 years ago

Can anyone answer this?

e-lub [12.9K]

I think the correct answer is :D

3 0

3 years ago

A portion of a daycare has been set aside for toddlers under 2. The dimensions are shown. A scale drawing of the room is 1.5 cm

Anettt [7]

Answer:

2.4 cm.

Step-by-step explanation:

See the given diagram of two similar triangles one with actual dimensions and the other drawn on paper with a certain scale.

The ratio of corresponding sides of two similar triangles is always the same.

Now, 1.5 cm on the drawing is equivalent to 2.5 m i.e. 250 cm. in actual dimension.

So, 4 m i.e. 400 cm in actual dimension will be equivalent to $\frac{1.5}{250} \times 400 = 2.4$ cm. in the drawing. (Answer)

7 0

4 years ago

Consider the following two-person zero-sum game. Both players simultaneously call out one of the numbers f2; 3g. Player I wins i

boyakko [2]

Answer:

The pay off matrix (for numbers 1-9) is shown in the attached table.

The value of the game (expected winning per play) = $9.57

The strategy for player II is to call even numbers all the time, which guarantees a winning in every game!

The strategy for player I is to call odd numbers all the time, in case player II calls odd numbers (good luck!)

Step-by-step explanation:

The pay off matrix (for numbers 1-9) is shown in the attached table.

The payoff for player II (even wins) is 775 for 9*9 = 81 possible scenarios.

Thus the value of the game is 775/81 = $9.57 (expected winnings per play)

The strategy for player II is to call even numbers all the time, which guarantees a winning in every game!

The strategy for player I is to call odd numbers all the time, in case player II calls odd numbers (good luck!)

3 0

3 years ago