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gavmur [86]
3 years ago
13

Select whether each system of equations has no solution, one solution, or infinitely many solutions.

Mathematics
1 answer:
erik [133]3 years ago
5 0

Answer:

one solution, no solution, infinitely many solutions

Step-by-step explanation:

I rearranged the first equation into x=6-2y

plug that into the second equation

2(6-2y)-3y=26

12-4y-3y=26

12-7y=26

-7y=14

y=-2

Then you plug that into one of the equations

x+2(-2)=6

x-4=6

x=10

The solution to the first system is (10,-2)

the second system already has one equation as something equal to a single variable so you just plug that into the other one

4x-2(2x-4)=-6

4x -4x +8 =-6

8=-6

this is a false statement so the system of equation has no solution

Lastly I rearranged the first equation into y=2x-4 and then plug that in

6x-3(2x-4)=12

6x-6x+12=12

12=12

this statement is true so the system of equations has infinite solutions

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Answer:

Step-by-step explanation:

Using annuity, each sisters saving can be calculated.

Annuity formula:

Fv = PMT (( 1 + i)^n - 1) / i

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i is the rate per period ( 7%) and n is the number of payments.

Using the above formula to calculate each sister savings after their respective years of savings

Jane ( between 25 - 35, with n = 10 years)

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Joan ( between 35 - 65, with n = 30 years)

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Joan actually have invested more since over 30 years she has invested $60000 while Jane on the other hand invested for 10 years which equals $20000 and Joan has more money after retirement. Going by the result it will make sense for Jane to emulate Joan or increase her number of years of saving in other to improve her retirement saving significantly close to Joan or even more.

5 0
3 years ago
I need this whole page solved please
Nuetrik [128]

Answer:

5. 540°

Step-by-step explanation:

m<a + m<c = 180°

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2 years ago
Which of the following best describes the expression 6(y + 3)?
Luda [366]
<span>The product of a constant factor of six and a factor with the sum of two terms, because 6* the sum of y+3.
</span>
7 0
3 years ago
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Write the number equal to 5 tens and 13 ones
serious [3.7K]
To find this out we have to add 5 tens and 13 ones. 
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And 13 ones is equal to 
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Now add 50 and 13 
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So your answer is 63 

good Luck! :)
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3 years ago
Which of the following is a quadratic function?
Gala2k [10]

Answer:

A

Step-by-step explanation:

A

when multiplied out

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7 0
3 years ago
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