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3 years ago

Please help me with this!

Mathematics

1 answer:

aleksandr82 [10.1K]3 years ago

5 0

$\frac{ {x}^{2} + 3x + 2}{x + 2} = \frac{ {x}^{2} + 2x + x + 2 }{x + 2} \\ = \frac{x(x + 2) + 1(x + 2)}{x + 2} \\ = \frac{(x + 2)(x + 1)}{x + 2} \\ = x + 1 \: \: \: \: (ans)$
Above is the correct method to solve this question.

Bror did wrong while solving the question because we can't directly divide any equation.

Hope this helps!

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Doug estimates that his soccer team will win 7 games this year. The team actually wins 10 games. What is the percent error of Do

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Answer: 30%

Step-by-step explanation:

Percent error = $\dfrac{|\text{Estimated value - Actual value}|}{\text{Actual value}}\times100\%$

Estimated number of games win this year = 7

Actual number of games won = 10

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Hence, the percent error of Doug’s estimate = 30%

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3 years ago

What is the solution to 3-3x + 9| = -18?

solmaris [256]

Answer:

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Step-by-step explanation:

Absolute Value Equation entered :

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Step by step solution :

Step 1: Rearrange this Absolute Value Equation

Absolute value equalitiy entered

3|3x-9| = 18

Step 2: Clear the Absolute Value Bars

Clear the absolute-value bars by splitting the equation into its two cases, one for the Positive case and the other for the Negative case.

The Absolute Value term is 3|3x-9|

For the Negative case we'll use -3(3x-9)

For the Positive case we'll use 3(3x-9)

Step 3: Solve the Negative Case

-3(3x-9) = 18

Multiply

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Rearrange and Add up

-9x = -9

Divide both sides by 9

-x = -1

Multiply both sides by (-1)

x = 1

Which is the solution for the Negative Case

Step 4: Solve the Positive Case

(3x-9) = 18

Multiply

9x-27 = 18

Rearrange and Add up

9x = 45

Divide both sides by 9

x = 5

Which is the solution for the Positive Case

Step 5: Wrap up the solution

x=1

x=5

Solutions on the Number Line

Two solutions were found :

x=5

x=1

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2 years ago