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4 years ago

I really need help please help me

Mathematics

1 answer:

hram777 [196]4 years ago

5 0

Answer:

i11, i26, i20, i21

Step-by-step explanation:

Alright, so there's an order to imaginary numbers. At the 1st power, it's i. At the second, it's -1. At the 3rd, it's -i. At the 4th, it's 1. And at the 5th, it restarts.

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Simplify: 7^-8 x 7^-4 someone please help me?

snow_tiger [21]

Answer:

7.22476158 x 10^-11

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

Help me please & thank you in advance (:

DENIUS [597]

Answer:

72 ft

Step-by-step explanation:

let height of brob.. (whatever that long name is) be equal to h.

=> h/g = g/l

=> h = 6 x 6 / 0.5

=> h = 36 / 0.5

=> h = 72 ft

8 0

2 years ago

Please help me out. I don’t understand this problem.. An equation of a line through (-7,-10) which is perpendicular to the line

nordsb [41]

Answer:

The Equation:

$y = \frac{1}{3}x - \frac{23}{3}$

The y-intercept:

$-\frac{23}{3}$

Step-by-step explanation:

Things you need to know:

Perpendicular mean opposite slope.

Need to know point slope form of a linear equation $y - y_1 = x(x - x_1)$

Ok, with that out the way, lets get started!

From the equation y = -3x + 2 we can see the slope, which is -3. We are asked to find an equation that is perpendicular to that slope so that means we need an opposite slope. To turn this slope to an opposite slope flip it and change the sign

-3 = $\frac{-3}{1} = \frac{1}{3}$

Now that we have our opposite slope, which is $\frac{1}{3}$ , we can find the equation the problem is asking us to solve.

We do this by using the point (-7, -10) and our new slope, which is $\frac{1}{3}$ and by using $y - y_1 = x(x - x_1)$

Insert our point and slope into $y - y_1 = x(x - x_1)$ and solve for y

$y - y_1 = x(x - x_1)$

$y - (-10) = \frac{1}{3}(x - (-7))$

$y + 10) = \frac{1}{3}(x + 7))$

Work on the right side of the = sign

Distribute 1/3 to x and 7

$y + 10 = \frac{1}{3}(x + 7))$

$y + 10 = \frac{1}{3}x + \frac{7}{3}$

Bring the 10 over to the right side by adding a -10

$y + 10 -10= \frac{1}{3}x + \frac{7}{3} - 10$

$y = \frac{1}{3}x + \frac{7}{3} - 10$

Do the math for $\frac{7}{3} - 10 = -\frac{23}{3}$

$y = \frac{1}{3}x - \frac{23}{3}$

We are done.

The Equation:

$y = \frac{1}{3}x - \frac{23}{3}$

The y-intercept:

$-\frac{23}{3}$

7 0

3 years ago

3 divided by 4 equals(x-9) divides by 16

stiv31 [10]

Answer:

x = 21

Step-by-step explanation:

Multiply both sides by 16

3/4 x 16 = x - 9

2 Simplify 3/4 x 16 to 48/4

48/4 = x - 9

3 Simplify 48/4 to 12

12 = x - 9

4 Add 9 to both sides.

12 = x - 9

5 Simplify 12+9 to 21

21=x

6 Switch sides.

Answer: x=21

3 0

3 years ago

Why is y=-12.5x have a proportional relationship

Natalka [10]

Answer:

A proportional relationship is any relationship that stays constant. since both sides of the equation do not change, this is a proportional relationship

8 0

3 years ago