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3 years ago

Which expression is equivalent to this expression? x(2x + 3)

Mathematics

1 answer:

Valentin [98]3 years ago

7 0

Use distributive property: a(b + c) = ab + ac

x(2x + 3) = (x)(2x) + (x)(3) = 2x² + 3x

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Wht is -3(2x-1)+8=15

Svetllana [295]

Answer:

x=- $\frac{2}{3}$

Step-by-step explanation:

subtract -3(2x-1)+8=15

-8 -8

_____________

-3(2x-1)=7

divide

$\frac{-3(2x-1)}{-3} =\frac{7}{3}$

then simplify

2x-1= $\frac{7}{3}$

add both sides

2x-1+1= $\frac{7}{3}$ +1

simplify again

2x-1+1= $\frac{7}{3}$ +1=2x= $-\frac{4}{3}$

divide by 2

2x= $-\frac{4}{3}$

-2 -2

_________

2x÷2=1

$-\frac{4}{6}divided by 2$

x=- $\frac{2}{3}$

5 0

3 years ago

Find the limit as x approaches 0 of x/sin3x

frozen [14]

$\lim_{x \to 0} \frac{x}{sin 3x} = \\ =\frac{0}{0}= \\ = \lim_{x \to 0} \frac{3x}{3sin3x} =$
= 1/3 ( because the limit as x approaches 0 of t/sin t = 1 ).

5 0

3 years ago

Annual snowfall in Anchorage, Alaska, is normally distributed with a mean height of 76 inches and a standard deviation of 4.7 in

lukranit [14]

Answer:

67.75%

Step-by-step explanation:

Given:

Given that:

µ = 76 ; σ = 4.7

P(x < 80.7) - P(x < 71.4)

Obtain the standardized score, Z ; x = 71. 4

Zscore = (x - μ) / σ

P(x < 71.4) = (71.4 - 76) / 4.7

P(x < 71.4) = - 4.6 / 4.7

P(x < 71.4) = - 0.9787

P(z < 0.9787) = 0.16386

x = 80.7

P(x < 80.7) = (80.7 - 76) / 4.7

P(x < 80.7) = 4.7 / 4.7

P(x < 80.7) = 1

P(z < 1) = 0.84134

0.84134 - 0.16386 = 0.67748 = 67.748% = 67.75%

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2 years ago

F(x)=-5x-4x^-3 Please Help!

andreyandreev [35.5K]

Answer:

-:3"5'6:7;8\4-4-4-4✓

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3 years ago

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Naya [18.7K]

Answer:

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2 years ago