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2 years ago

1. The following system has NO SOLUTION. Explain with specific values why the system has no solutions.

Mathematics

2 answers:

vovangra [49]2 years ago

5 0

Answer:

Yea that problem is a bit confusing,

2y should be double of what y is, which is 4x+5

Then 2y says 8x+15, when it should be 8x+10.

I feel bad cause I am sure the teacher is wrong on this, he/she had probably made a typo, or you made a typo, but that's ok! We all make typos!

The teacher would be extra rude if they marked you wrong on this, cause the question itself is not written "properly"

Hunter-Best [27]2 years ago

5 0

Usually ur meant to simplify or something like if u divide the 2 by 2 u get 1y which is 1 and do the same to 8x which is 4x and +15 would be 7.5 but put it in fraction form not decimal. yea u cant get a solution from the 2y

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3 years ago

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2 years ago

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3 years ago

This is due in 10 minutes please help me

valkas [14]

Given:

The rate of interest on three accounts are 7%, 8%, 9%.

She has twice as much money invested at 8% as she does in 7%.

She has three times as much at 9% as she has at 7%.

Total interest for the year is $150.

To find:

Amount invested on each rate.

Solution:

Suppose x be the amount invested at 7%. Then,

The amount invested at 8% = 2x

The amount invested at 9% = 3x

Total interest for the year is $150.

$x\times \dfrac{7}{100}+2x\times \dfrac{8}{100}+3x\times \dfrac{9}{100}=150$

Multiplying both sides by 100, we get

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Dividing both sides by 50, we get

$x=\dfrac{15000}{50}$

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$2(300)=600$

The amount invested at 9% is

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Hence, the stockbroker invested $300 at 7%, $600 at 8%, and $900 at 9%.

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3 years ago