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3 years ago

Which is the first incorrect step in the solution shown above ?

Mathematics

2 answers:

11Alexandr11 [23.1K]3 years ago

8 0

Answer:

Step 2

Step-by-step explanation:

2x was moved to 3x just to add.

It was supposed to be 3x - 2x = x

Sedaia [141]3 years ago

3 0

Answer:

Step 2 is incorrect

Step-by-step explanation:

Step 2 is incorrect

step 1: 3x + 15 = 2x + 35

step 2: subtract 2x from both sides

3x + 15 - 2x = 2x + 35 - 2x

x + 15 = 35

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Answer:

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Step-by-step explanation:

y=mx+b

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Answer:

A sample size of at least 531 is required.

Step-by-step explanation:

We are lacking the confidence level to solve this question, so i am going to use a 90% confidence level.

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Rounding up

A sample size of at least 531 is required.

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3 years ago

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Answer:

11. $\frac{24}{25}$

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Step-by-step explanation:

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Find the sum of x^2 + 3x and 2x^2 + 9x + 5

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Answer:

$3 {x}^{2} + 12x + 5$

Step-by-step explanation:

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