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iren2701 [21]
4 years ago
12

Solve the following system of equations: 2x+y=1 -4+y=-1

Mathematics
1 answer:
STALIN [3.7K]4 years ago
4 0
2x+y=1
-2x -2x
————
[y=-2x+1]
-4+1(-2x+1)=-1
4-2x+1=-1
-1 -1
———————
3-2x=-1
-3 -3
———————
-2x=-4
—— —
-2 -2
[X=2]

2(2)+y=1
4+y=1
-4 -4
————
[y=-3]

x y
Answer: (2,-3)

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Answer:

Winchester Heights Middle School plan to have 385 students in the  upcoming school year.

Step-by-step explanation:

Total number of students in the seventh grade at Winchester  Heights Middle School = 350

For the upcoming school year, they are planning to  increase the number of seventh graders by 10%.

Rate of increase = r = 10% = 0.1

Formula :N(t)=N_0(1+r)^t

Where N_0= initial population = 350

r = rate of increase =0.1

N(t)=Population after t years

t = time in years

So, Population after 1 year = 350(1+0.1)^1 =385

Hence  Winchester Heights Middle School plan to have 385 students in the  upcoming school year.

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3 years ago
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the answer will be 5

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If a 4-pound roast takes 150 minutes to cook, how long should a five-pound roast take
Ber [7]
188 minutes (rounded) or 187 minutes and 5 seconds 
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4 years ago
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stepan [7]

<u>{x}^{2}  + x - 10506 = 0</u>

Step-by-step explanation:

-x, -(x+1)

-x-(x+1)=10506

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Estimate the solution to the system of equations. 7x−y=7<br><br> x+2y=6<br> ​
ElenaW [278]

Answer:

I am not sure how your teacher wanted you to estimate the answer but I solved it for you. Hopefully this helps.

Step-by-step explanation:

7x-y=7

x+2y=6

14x-2y=14

x+2y=6

add both equations

15x=20

x=20/15

x=4/3

x+2y=6

4/3+2y=6

2y=6-4/3

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divide both sides by 2

y= 14/3 divided by 2

y=14/3(1/2)

y=14/6

2y=

3 0
3 years ago
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