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svetoff [14.1K]
3 years ago
9

Can someone explain 5. please ?

Mathematics
1 answer:
GuDViN [60]3 years ago
5 0

Both denominators are 4, so we can add the numerators to place over the common denominator. The numerators are -3 and -3, which add to -6. One way to think of negative numbers is to think of IOUs, which are a way of expressing debt in money. For instance, if you go into a store and buy a $10 item, but only have $3 in your pocket, then you would have to owe the owner $7. This can be represented with -7. If you repeat the process, then you'd have 7+7 = 14 in IOUs total. This would be represented with -14

In short, adding negative numbers is really the same as adding positives, but the final result is negative

So that's why -3+-3 turns into -6. We add the two threes like normal but then make the final result negative. All throughout this process, the denominator stays at 4.

So we end up with -6 over 4 which reduces to -3 over 2. How is this reduction happening? We are simply dividing each piece by the greatest common factor 2.

-6 divided by 2 = -3

4 divided by 2 = 2

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Hey!

Hope this helps...

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6 0
3 years ago
In △ABC, ∠C is a right angle and sinB=725.
scoundrel [369]

9514 1404 393

Answer:

  A  7/25

Step-by-step explanation:

The cosine of an angle is equal to the sine of its complement. In a right triangle, angle A is the complement of angle B. So, ...

  cos(A) = sin(B)

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8 0
2 years ago
A sixth grade class of 295 students is having an end of the year laser tag party. The party will cost
Korolek [52]

Answer:

The total cost of the party is approximately $2300, hence the correct answer is option D.

Step-by-step explanation:

Given:

Number of students = 295 students

cost per student =  $8.95

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To find:

We need to estimate the total cost of the party.  

Solution:

To find the total cost of the party we need to multiply the total number of students into the cost per student.

This can be done as follows:

=295×8.95

=2640.25

Therefore, the total cost of the party is $2640.25, but it is given that the laser tag company gave the students a discount of $400. Hence the total cost after discount is  

=2640.25-400

=2240.25

Therefore, the total cost of the party is approximately $2300

Hence the correct answer is option D.

7 0
3 years ago
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Illusion [34]

Answer:

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Step-by-step explanation:

7 0
3 years ago
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Answer:

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Step-by-step explanation:

F(x)=4x+10

F(-2)

F(-2)=4(-2)+10

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6 0
3 years ago
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