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iogann1982 [59]
2 years ago
9

Ax + by = a - b bx - ay = a+ b by elimination ​

Mathematics
2 answers:
AnnZ [28]2 years ago
5 0
Answer: x = 1, y = -1

Step-by-Step Explanation:

As the answer involves many steps, I’ve taken a pic of my working. Please check the attached photo.

melisa1 [442]2 years ago
4 0

ax + by = a - b   \:  \:  \: ...(i)\\  \\ bx - ay = a+ b  \:  \:  \: ...(ii) \\  \\

Multiply equation (i) with a and equation (ii) with b ,

{a}^{2} x + aby =  {a}^{2}  - ab \:  \:  \:  ...(iii)\\  \\  {b}^{2} x - aby = ab +  {b}^{2}  \:  \:  \: ...(iv)

Adding (iii) and (iv) , we get ,

( {a}^{2}  +  {b}^{2} )x =  {a}^{2}  +  {b}^{2}  \\  \\ x = 1

Now , from (i) ,

ax+by=a−b \\  \\ a+by=a−b\\  \\ by=−b \\  \\ y=−1

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The value of $y$ varies inversely as $\sqrt x$ and when $x=2$, $y=4$. What is $x$ when $y=1$?
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3 years ago
Which one of the following is NOT equal to the others?
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The students in the Go Green dub started a whool recling program. In
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Answer:

Students collected

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Step-by-step explanation:

In September, the students collected 85 pounds of paper and 18 pounds of cans to recycle.

In October, their goal is to collect three times the amount of paper and five times the amount of cans they collected in September.

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