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daser333 [38]
3 years ago
15

Please help me pleeeeeeaaassseee

Mathematics
1 answer:
mr_godi [17]3 years ago
4 0

Answer:

Step-by-step explanation:

answer no 3:

1] Factor out the common term 2.

2(3x+y) = -26

2] Divide both sides by 2.

3x+y= -26/2

3x+y = − 13

 

3]Subtract y from both sides.

3x = - 13-y

4] Divide both sides by 3.

x = -13-y/3

Part 2:-

Add 6y to both sides.

x=21+6y

x=21+6y

​  

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olga2289 [7]
y =  \dfrac{2}{7} x - 3

When x = 4,

y =  \dfrac{2}{7} (4) - 3

y =  \dfrac{8}{7} - 3

y = -\dfrac{13}{7}

----------------------------------------------------------
Answer: (4 , -13/7)
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5 0
3 years ago
How many solutions does the following system have? <br><br> 2x+3y=1; -3x-2y=-1
zysi [14]

Answer:

x = 1/5 , y = 1/5

Step-by-step explanation:

Solve the following system:

{2 x + 3 y = 1 | (equation 1)

-3 x - 2 y = -1 | (equation 2)

Swap equation 1 with equation 2:

{-(3 x) - 2 y = -1 | (equation 1)

2 x + 3 y = 1 | (equation 2)

Add 2/3 × (equation 1) to equation 2:

{-(3 x) - 2 y = -1 | (equation 1)

0 x+(5 y)/3 = 1/3 | (equation 2)

Multiply equation 1 by -1:

{3 x + 2 y = 1 | (equation 1)

0 x+(5 y)/3 = 1/3 | (equation 2)

Multiply equation 2 by 3:

{3 x + 2 y = 1 | (equation 1)

0 x+5 y = 1 | (equation 2)

Divide equation 2 by 5:

{3 x + 2 y = 1 | (equation 1)

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Subtract 2 × (equation 2) from equation 1:

{3 x+0 y = 3/5 | (equation 1)

0 x+y = 1/5 | (equation 2)

Divide equation 1 by 3:

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Collect results:

Answer: {x = 1/5 , y = 1/5

8 0
3 years ago
An aquarium contained an equal number of horseshoe crabs and sea stars. After 15 horseshoe crabs were removed and 27 sea stars w
KATRIN_1 [288]

Answer:

45 horseshoe crabs and 45 sea stars

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The aquarium initially contained x crabs and x sea stars.

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(x-15):(x-27) = 5:3

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3(x-15) = 5(x-27)

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90 = 2x

x = 45

5 0
3 years ago
Please show work and solve will mark as brainly
dolphi86 [110]

Answer:

4 hours

Step-by-step explanation:

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8 0
2 years ago
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Could someone please list all of the basic derivative rules?
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Answer:

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5 0
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