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1 year ago

The imaginary number i is defined as ? (1) -1 (3) √-4 (2) √-1 (4) (-1)²

Mathematics

1 answer:

Kryger [21]1 year ago

8 0

Answer:

√-1

Step-by-step explanation:

The imaginary number i is defined as √(-1)

NOTE : i² = -1

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Bond [772]

Answer:

replace the given values of x and y

Step-by-step explanation:

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2 years ago

Use place value to find the product.

Aleonysh [2.5K]

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2 years ago

show that the points (1 ,7) ,(4, 2), (-1, -1) and (-4, 4) taken in order are the vertics of a square. Also find its area

OLga [1]

Answer:

Step-by-step explanation:

A (1 ,7) , B(4, 2), C(-1, -1) and D(-4, 4)

Find the distance of sides using distance formula.

Distance = $\sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}}$

A (1 ,7) , B(4, 2)

$AB = \sqrt{(4-1)^{2}+(2-7)^{2}}\\\\ =\sqrt{3^{2}+(-5)^{2}}\\\\ \\ = \sqrt{9+25}=\sqrt{34} units\\\\\\\\BC = \sqrt{(-1-4)^{2}+(-1-2)^{2}}\\\\ =\sqrt{(-5)^{2}+(-3)^{2}} = \sqrt{25+9}=\sqrt{34} units\\\\\\CD = \sqrt{(-4-[-1])^{2}+(4-[-1])^{2}}\\\\=\sqrt{(-4+1)^{2}+(4+1)^{2}}\\\\=\sqrt{(-3)^{2}+(5)^{2}}\\\\=\sqrt{9+25} = \sqrt{34} units\\\\\\AD = \sqrt{(-4-1)^{2}+(4-7)^{2}}\\\\=\sqrt{(-5)^{2}+(-3)^{2}} =\sqrt{25+9} = \sqrt{34} units$

AB = BC = CD = AD = √34 units. so , ABCD is a square.

Area of square = side * side

= √34 * √34

= 34 square units

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2 years ago

Ruby uses 3/8 of a cup of blueberries for her smoothie. If she has 4

Artyom0805 [142]

Answer:

10 smoothies

Step-by-step explanation:

because each 3/8th yields 2 smoothies and the leftovers from each cup made 2 more.

3 0

2 years ago

F(x) = -3x + 7 x = -2

Marat540 [252]

Answer:

X= 1/2

Step-by-step explanation:

-3x+7x=2

4x = 2

4x/4 + 2/4

X= 1/2

8 0

2 years ago

Read 2 more answers