3 years ago

I need to get the answers for the blanks

Mathematics

1 answer:

Tema [17]3 years ago

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Is it a rhombus or is it just a parallelogram?

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stepan [7]

The first is either b or c and the second is d. Sorry for not telling yoi what the answer is for the first one

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2 years ago

If a tree in a 1 in. : 2 ft. scale drawing is 10 inches tall, how tall is the actual tree?

Citrus2011 [14]

Answer:

20 feet tall

Step-by-step explanation:

Since it is 1 in: 2ft and the drawing is 10 in, you multiply 10 by 2 and get 20 feet.

(hope this helps!)

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2 years ago

Complex root of x^2+3x+9=0

Luden [163]

$\text{Quadratic formula}$

$ax^2+bx+c=0\\\\\Delta=b^2-4ac\\\\x_1=\dfrac{-b-\sqrt\Delta}{2a};\ x_2=\dfrac{-b+\sqrt\Delta}{2a}$

-----------------------------------------------------------------------

$x^2+3x+9=0\\\\a=1;\ b=3;\ c=9\\\\\Delta=3^2-4(1)(9)=9-36=-27\\\\\sqrt\Delta=\sqrt{-27}=\sqrt{(27)(-1)}=\sqrt{27}\cdot\sqrt{-1}=\sqrt{9\cdot3}i=\sqrt9\cdot\sqrt3i=3\sqrt3i$

$x_1=\dfrac{-3-3\sqrt3i}{2(1)}=-\dfrac{3}{2}-\dfrac{3\sqrt3}{2}i\\\\x_2=\dfrac{-3+3\sqrt3i}{2(1)}=-\dfrac{3}{2}+\dfrac{3\sqrt3}{2}i$

$i=\sqrt{-1}$

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2 years ago

What is the slope to this one? Will give brainliest

Mademuasel [1]

Answer:

Negative Slope.

-7/5

Step-by-step explanation:

Decreasing from left to right.

x = 3- -2 = 5

y = -2 - 5 = -7

y = -7/5x + 11/5

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2 years ago

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Tell whether each table represents a linear relationship...

grigory [225]

Yes it is you are constantly
adding 2 (x) for every 1 (y)

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2 years ago