3 years ago

Simplify the expression. Use standard polynomial format. x(2x + 3) + (x - 3)(x - 4)

Mathematics

1 answer:

timofeeve [1]3 years ago

5 0

Answer:

x(2x + 3) + (x - 3) (x - 4) = 3x²- 4x + 12

Step-by-step explanation:

Expand:

x(2x + 3): 2x² + 3x

2x² + 3x + (x - 3) (x - 4)

Expand:

(x - 3) (x - 4): x²- 7x + 12

2x² + 3x + x²- 7x + 12

Simplify:

2x² + 3x + x² - 7x + 12: 3x² - 4x + 12

= 3x² - 4x +12

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2 years ago

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3 years ago

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Serggg [28]

Answer:

The weighted average is of 69.94.

Step-by-step explanation:

Weighted average:

The weighed average is found multiplying each grade by its respective weight.

The grades, and weights are:

67 on the lab, with a weight of 23% = 0.23

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3 years ago