!!Please help!! This is algebra and I don't understand

Mathematics

1 answer:

Shkiper50 [21]3 years ago

6 0

Answer:

To understand this, bags of gas added make it go up, while bags of sand added make it go down:

1). Add bags of gas | balloon goes UP | 3 bags of gas ( +3 ), 10 bags of sand ( +10 )

2). Add bags of sand | balloon goes DOWN | 3 bags of sand ( -3 ), 10 bags of sand ( -10 )

3). Subtract bags of gas | balloon goes DOWN | subtract 3 bags of gas  - ( +3 ), subtract 10 bags of gas  - ( +10 )

4). Subtract bags of sand | balloon goes  UP  | subtract 3 bags of sand  - ( -3 ), subtract 10 bags of sand  - ( 10 )

<h2>HOPE THIS HELPS.</h2>

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Evaluate yx^y - xy^x for x = 1/2 and y=4. A: -3/4 B: -1/2 C: 1/4 D: 3/4

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Answer:

Step-by-step explanation:

7 0

3 years ago

1/x + 1/a=1/b,then x=

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$\dfrac{1}{x}+\dfrac{1}{a}=\dfrac{1}{b}\ \ \ |subtract\ \dfrac{1}{a}\ from\ both\ sides\\\\\dfrac{1}{x}=\dfrac{1}{b}-\dfrac{1}{a}\\\\\dfrac{1}{x}=\dfrac{a}{ab}-\dfrac{b}{ab}\\\\\dfrac{1}{x}=\dfrac{a-b}{ab}\Rightarrow\dfrac{x}{1}=\dfrac{ab}{a-b}\to\boxed{x=\dfrac{ab}{a-b}}$