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zloy xaker [14]
3 years ago
15

Check/correct my work please! Working with polynomials and stuff.

Mathematics
1 answer:
OLEGan [10]3 years ago
8 0
1. (b+2)(b+2)=b^2 +4b + 4  (FOIL)
2.  FOIL;  x^2 + 6x + 9
3.  correct
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What is the equation of the line that is perpendicular to y= -3x + 1 and passes through (2,3)?
Aleonysh [2.5K]

Answer:

\large\boxed{y=\dfrac{1}{3}x+2\dfrac{1}{3}}

Step-by-step explanation:

\text{Let}\ k:y=_1x+b_1\ \text{and}\ l:y=m_2x+b_2.\\\\l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}\\============================\\\\\text{We have}\ y=-3x+1\to m_1=-3.\\\\\text{Therefore}\ m_2=-\dfrac{1}{-3}=\dfrac{1}{3}.\\\\\text{The equation of the searched line:}\ y=\dfrac{1}{3}x+b.\\\\\text{The line passes through }(2,\ 3).

\text{Put the coordinates of the point to the equation.}\ x=2,\ y=3:\\\\3=\dfrac{1}{3}(2)+b\\\\3=\dfrac{2}{3}+b\qquad\text{subtract}\ \dfrac{2}{3}\ \text{from both sides}\\\\b=2\dfrac{1}{3}

3 0
3 years ago
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Find the area of this triangle​
creativ13 [48]

Answer:

The area should be 170

Step-by-step explanation:

L× W =70×10=170

5 0
3 years ago
PLEASE HELP WILL MARK BRAINLIEST The frequency f​ (in waves per​ second) and the wavelength w​ (in meters) of a sound traveling
marshall27 [118]

You gave us the speed and the frequency, and you need the wavelength.

You were also nice enough to remind us that (fqy)x(lng) = speed.

So . . . F x W = 343 m/s

Divide each side by F :

W = (343 m/s) / F

W = (343 m/s) / (240 / s)

W = (343/240) m

<em>W = 1.429 meters</em>

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3 years ago
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grin007 [14]

Answer:

Like terms are similar and terms are different.

Like terms :-

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They are similar.

Terms :-

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One has an exponent and other does not which means they are not like terms and are only terms.

Hope this helps, thank you :) !!

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3 years ago
Margie says the set of numbers, 0.1, -1, -21
rjkz [21]

Answer:

-21, -1, 0.1, 3, 4

Step-by-step explanation: the higher the negative number is the lower the number is for example -30 is lowe then -1

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3 years ago
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