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Natasha_Volkova [10]
3 years ago
14

3x² + 7x - 5 + 2x² Simplify

Mathematics
1 answer:
Mnenie [13.5K]3 years ago
7 0

Answer:

3x^2 + 7x - 5 + 2x^2

= 5x^2 + 7x - 5 (a=5, b=7, c=-5)

x = (-b+/- √(b^2 - 4ac))/2a

= (-7+/- √(49+100))/10

= (-7+√149)/10, (-7-√149)/10

Hope this helps!

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Answer:

Option 1: y-6=-4(x+2)

Step-by-step explanation:

Find the slope of the perpendicular line by finding the negative reciprocal of the original slope. (Negative reciprocal = flip upside down and add a negative). So we get -4 for the perpendicular slope.

Next, we know the point (-2,6) is on the line, so we can get x=-2 and y=6.

Plug this into point-slope form: y_{1}-y_{2}=m(x_{1}=x_{2})

y_{1} - (6)=-4(x_{1}-(-2))

y-6=-4(x+2)

6 0
3 years ago
When solving inequalities with multiple operations, addition and subtraction are undone before multiplication and division.
nasty-shy [4]
True
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3 years ago
The scale size is 2cm:4m
MaRussiya [10]
I'm not sure which one is the scale size so i'll solve for both...

Ratio is 2cm:4m
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Option 1::

If the scale of the item is:

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then we can solve for the actual size by multiplying the values by 200

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w=6cm*200=1200cm or 12m

Option 2::

If the original item has a length of 12m and a width of 6m then:

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6 0
3 years ago
Read 2 more answers
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8 0
4 years ago
A government official is in charge of allocating social programs throughout the city of Vancouver. He will decide where these so
otez555 [7]

Answer: (0.132132, 0.274368)

Step-by-step explanation:

Given : A simple random sample of 123 people living in Gastown and finds that 25 have an annual income that is below the poverty line.

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\hat{p}=\dfrac{25}{123}\approx0.203252

Critical value for 95% confidence interval : z_{\alpha/2}=1.96

Confidence interval for population :

\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

i.e. 0.203252\pm (1.96)\sqrt{\dfrac{0.203252(1-0.203252)}{123}}

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Hence, the 95% confidence interval for the true proportion of Gastown residents living below the poverty line : (0.132132, 0.274368)

5 0
4 years ago
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