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sp2606 [1]
3 years ago
13

The equation for y=-2x+5 that is paralell passes through (1,-4)?

Mathematics
1 answer:
sattari [20]3 years ago
6 0
0 beaxysabahagpannauqqu
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6 cm<br> 4 cm<br> 9.5 cm<br> 4 cm<br> 6.5 cm<br> I need help I have to find the perimeter for this
NeX [460]

Answer:

30 cm is the perimeter.

Step-by-step explanation:

To find the perimeter of this figure, add up all the lengths of the sides:

6 cm

4 cm

9.5 cm

4 cm

6.5 cm

-----------

30 cm is the perimeter.

8 0
2 years ago
Read 2 more answers
Can you please help and explain this to me please ​
MrRa [10]

Answer:

25

Step-by-step explanation:

Use the order of operations.

3 0
3 years ago
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Someone please help<br> Find the common difference of 49, 43, 37
Marina CMI [18]

minus 6

Step-by-step explanation:

From 49 to 43 you minus 6

from 43 to 37 you minus 6

Please give me brainliest!

8 0
3 years ago
Please help me I really need help
elixir [45]

Answer:

56

Step-by-step explanation:

Lowest Common Multiple= 56

8 0
3 years ago
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determine the point of intersection of the following pair of lines ............2x-3y-4=-13 and 5x=-2y+25. 3x+2y-7=0 and 2x=12-5y
grandymaker [24]

Answer:

  1. (x, y) = (3, 5)
  2. (x, y) = (1, 2)

Step-by-step explanation:

A nice graphing calculator app makes these trivially simple. (See the first two attachments.) It is available for phones, tablets, and as a web page.

__

The usual methods of solving a system of equations involve <em>elimination</em> or <em>substitution</em>.

There is another method that is relatively easy to use. It is a variation of "Cramer's Rule" and is fully equivalent to <em>elimination</em>. It makes use of a formula applied to the equation coefficients. The pattern of coefficients in the formula, and the formula itself are shown in the third attachment. I like this when the coefficient numbers are "too messy" for elimination or substitution to be used easily. It makes use of the equations in standard form.

_____

1. In standard form, your equations are ...

  • 2x -3y = -9
  • 5x +2y = 25

Then the solution is ...

  x=\dfrac{-3(25)-(2)(-9)}{-3(5)-(2)(2)}=\dfrac{-57}{-19}=3\\\\y=\dfrac{-9(5)-(25)(2)}{-19}=\dfrac{-95}{-19}=5\\\\(x,y)=(3,5)

__

2. In standard form, your equations are ...

  • 3x +2y = 7
  • 2x +5y = 12

Then the solution is ...

  x=\dfrac{2(12)-5(7)}{2(2)-5(3)}=\dfrac{-11}{-11}=1\\\\y=\dfrac{7(2)-12(3)}{-11}=\dfrac{-22}{-11}=2\\\\(x,y)=(1,2)

_____

<em>Note on Cramer's Rule</em>

The equation you will see for Cramer's Rule applied to a system of 2 equations in 2 unknowns will have the terms in numerator and denominator swapped: ec-bf, for example, instead of bf-ec. This effectively multiplies both numerator and denominator by -1, so has no effect on the result.

The reason for writing the formula in the fashion shown here is that it makes the pattern of multiplications and subtractions easier to remember. Often, you can do the math in your head. This is the method taught by "Vedic maths" and/or "Singapore math." Those teaching methods tend to place more emphasis on mental arithmetic than we do in the US.

7 0
3 years ago
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