2 years ago

8

Mathematics

1 answer:

Simora [160]2 years ago

3 0

The slope of the line is y=-4x + 18 :)

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The roots of an equation are x=-1 plus or minus I the equation is x^2+ ?

Oxana [17]

Answer:

x^2+2x+2

Step-by-step explanation:

If the roots of the equation are -1\pm i, then by the zero product rule:

$x=-1\pm i \\\\x+1\pm i=0 \\\\(x+1+i)(x+1-i)=0\\\\x^2+x-ix+x+1-i+ix+i+1=0 \\\\x^2+2x+2=0$

You can confirm this with the quadratic equation:

$x=\dfrac{-2\pm\sqrt{4-8}}{2}=\dfrac{-2\pm 4i}{2}=-1\pm i$

Hope this helps!

8 0

3 years ago

Please help me I suck at math

kari74 [83]

Answer:

B) 9 gallons

Step-by-step explanation:

It's asking you what 3/4ths of 12 is. Therefore, you multiply 3/4 by 12 to get your answer which is 9 gallons.

5 0

3 years ago

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17. Find the ratio of the perimeter to the area of the square shown.<br> x + 3<br> x + 3

Serga [27]

Answer:

4x+12/x^2+9

Step-by-step explanation:

Perimeter

x+3+x+3+x+3+x+3

Area

(x+3)(x+3)

7 0

2 years ago

Find the surface area of the prism.

Mekhanik [1.2K]

Answer: B 386

Step-by-step explanation:

(7*15)*2 + (7*4)*2 + (15*4)*2

= 210+120+56

= 386

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3 years ago

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Help please!! Don’t understand! 6th grade math

Agata [3.3K]

Answer:

4. is 6.6

Step-by-step explanation:

I hope this helps

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3 years ago