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3 years ago

What is the slope of the line going through the points (-3,-7.5) and (-2,-5)

Mathematics

1 answer:

lakkis [162]3 years ago

7 0

Answer:

2.5

Step-by-step explanation:

y2 - y1 = top

x2 - x1 = bottom

y2 = -5

y1 = -7.5

x2 = -2

x1 = -3

-5-(-7.5) = 2.5

-2-(-3) = 1

2.5 over 1 = 2.5

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Use the identity (x+y)(x−y)=x2−y2 to find the difference of two numbers if the sum of the numbers is 12 and the difference of th

Natalka [10]

Answer:

The difference of two numbers using identity $(x+y)(x-y)=x^2-y^2$ is 4.

Step-by-step explanation:

Given: The sum of the numbers is 12 and the difference of the squares of the numbers is 48.

To find the difference of two numbers using identity $(x+y)(x-y)=x^2-y^2$

Let the two numbers be a and b, then

Given that the sum of the numbers is 12

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Also, given the difference of the squares of the numbers is 48.

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Using given identity $(x+y)(x-y)=x^2-y^2$

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Liam is setting chairs for meeting he arranges chairs in 5 rows of the same length he has 3 chairs left over if he arranges the

Rina8888 [55]

Answer:

The answer to your question is 48 chairs

Step-by-step explanation:

Data

5 rows- 3 chairs left over

3 rows - 21 chairs left over

Process

1.- Write two equations each for each situation

x = number of rows

y = number of chairs

Equation 1 y = 5x + 3

Equation 2 y = 3x + 21

2.- Solve the system by equality

5x + 3 = 3x + 21

5x - 3x = 21 - 3

2x = 18

x = 18/2

x = 9

3.- Find the total number of chairs

y = 5(9)+ 3 y = 3(9) + 21

y = 45 + 3 y = 27 + 21

y = 48 y = 48

4.- Conclusion

There are 48 chairs

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