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3 years ago

What is the square root of -1?

Mathematics

2 answers:

pickupchik [31]3 years ago

6 0

Answer:

Unit Imaginary Number or i

mojhsa [17]3 years ago

4 0

Answer:

Step-by-step explanatidk

ion:

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Calculate the slope of the line that contains the points (-2, -4) and (2, 4).

liubo4ka [24]

Answer:

Slope is 2

Step-by-step explanation:

(-2, -4) and (2, 4)

Slope:

m=(y2-y1)/(x2-x1)

m=(4+4)/(2+2)

m=8/4

m = 2

6 0

3 years ago

Solve the equation for all values of x by completing the square.<br> x2 + 8.0 + 15 = 0

Aleonysh [2.5K]

Answer:

x= -3

x= -5

Step-by-step explanation:

x^2 + 8x + 15 = 0

find which 2 numbers when multiplied equal 15 and when added equal 8

they are 3 and 5

(x+3)(x+5)

x+3 =0

x+5=0

x= -3

x= -5

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2 years ago

"John spent $30 on six toy cars. How much did each toy car cost? Write a one step equation. Solve"

Alika [10]

John spent 30 on six cars 5 times 6 = 30

3 0

3 years ago

Read 2 more answers

In a certain function, y varies directly with x. If y = 6 when x = 8, find x when y = 9.

Hatshy [7]

If y = 6 when x = 8, then value of "x" when y = 9 is equal to 12

<u>Solution:</u>

Given that , In a certain function, y varies directly with x

And x = 8 when y = 6,

We have to find what will be the value of x when y = 9

Now, from the given information,

$\begin{array}{l}{y \alpha x} \\\\ {y=c x \rightarrow(1)}\end{array}$

where c is the proportionality constant

$\begin{array}{l}{\text { Now, substitute } x=8 \text { and } y=6 \text { in }(1)} \\\\ {\rightarrow 8=c(6) \rightarrow c=\frac{8}{6}} \\\\ {\rightarrow c=\frac{4}{3}} \\\\ {\text { Then, }(1) \rightarrow x=\frac{4}{3} y} \\\\ {\text { So, when } y=9} \\\\ {\rightarrow x=\frac{4}{3}(9)} \\\\ {\rightarrow x=4 \times 3} \\\\ {\rightarrow x=12}\end{array}$

Hence, x value is 12 when y value is 9

3 0

3 years ago

Simplify: 5x + 4x2 + 10 + 2x2 + 2x – 6+2 - 1.

erik [133]

The answer would be 7x+ 17

8 0

3 years ago