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Kitty [74]
3 years ago
12

3x + 4y = 18 -2x + 4y = 8 by elimination

Mathematics
2 answers:
ivolga24 [154]3 years ago
6 0

Answer:

x = -8/5 y + 26/5

Step-by-step explanation:

im not entirely sure but i tried my best hope this helps :)

SVEN [57.7K]3 years ago
5 0

Step-by-step explanation:

<h3>3x + 4y =18...........(1)</h3><h3>-2x+4y=8...............(2)</h3><h3>Same sign for 4y so Addition</h3><h3 /><h3 /><h2> x=26</h2><h3>Substitute in (2)</h3><h3> -2×26 +4y=8</h3><h3> -52+4y=8</h3><h3> 4y=8+52</h3><h3> 4y=60</h3><h2> y=15</h2>
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Work out the value of: 5x - 2y when x = 3 and y = 4
KATRIN_1 [288]
The expression is 5x - 2y
Use PEMDAS and work out the rest
x = 3 and y = 4
5 x = 5 x 3 = 15
2 y = 2 x 4 = 8
15( x ) - 8 (y) = 7
The answer is 7

Hope This Helps You!
Good Luck Studying :)
4 0
3 years ago
Read 2 more answers
Find the rectangular coordinates of the point (squareroot3, pi/6)
svet-max [94.6K]

Answer:

The rectangular coordinates of the point are (3/2 , √3/2)

Step-by-step explanation:

* Lets study how to change from polar form to rectangular coordinates

- To convert from polar form (r , Ф) to rectangular coordinates (x , y)

 use these rules

# x = r cos Ф

# y = r sin Ф

* Now lets solve the problem

∵ The point in the rectangular coordinates is (√3 , π/6)

∴ r = √3 and Ф = π/6

- Lets find the x-coordinates

∵ x = r cos Ф

∵ r = √3

∵ Ф = π/6

∴ x = √3 cos π/6

∵ cos π/6 = √3/2

∴ x = √3 (√3/2) = 3/2

* The x-coordinate of the point is 3/2

- Lets find the y-coordinates

∵ y = r sin Ф

∵ r = √3

∵ Ф = π/6

∴ y = √3 sin π/6

∵ sin π/6 = 1/2

∴ y = √3 (1/2) = √3/2

* The y-coordinate of the point is √3/2

∴ The rectangular coordinates of the point are (3/2 , √3/2)

6 0
3 years ago
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BaLLatris [955]

Answer:

The answer is C: 75

Step-by-step explanation:

The constant is found by multiplying your height and width, so thats really all you do.

25x3=75

15x3=75

3x15=75

25x3=75

75 would be the constant.

7 0
3 years ago
Read 2 more answers
What is 11 1/20 as a decimal?
Softa [21]

11,05

Step-by-step explanation:

11 1/20

= (11 × 20 + 1)/20

= (220 + 1)/20

= 221/20 → times 5

= 1105/100

= 11,05

5 0
2 years ago
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What is the slope of the line though the points ( -6, 3) and ( -7,-4)
DiKsa [7]
I believe the answer is 7
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3 years ago
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