All categories

3 years ago

Pls help really confusing

Mathematics

1 answer:

Anna007 [38]3 years ago

4 0

Answer:k,kkk

kkkkkkk

Step-by-step explanation:

You might be interested in

Find the complex zeros of the following polynomial function.

GalinKa [24]

Answer:

$x=\frac{-1\pm\sqrt{3}i}{2}$

Step-by-step explanation:

$f(x)=x^3-1$

$0=x^3-1$

$0=(x^2+2x+1)(x-1)$

$x-1=0$

$x=1$ <-- Real Solution

$x^2+x+1=0$

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

$x=\frac{-2\pm\sqrt{2^2-4(1)(1)}}{2(1)}$

$x=\frac{-1\pm\sqrt{1^2-4(1)(1)}}{2(1)}$

$x=\frac{-1\pm\sqrt{1-4}}{2}$

$x=\frac{-1\pm\sqrt{-3}}{2}$

$x=\frac{-1\pm\sqrt{3}i}{2}$ <-- Complex Solutions

6 0

3 years ago

8. Write an equation of your own that has one real solution. Transform the equation to demonstrate that it has one solution.

miskamm [114]

Answer:

$2x {?}^{2} + 3x - 1 = 0$

6 0

3 years ago

The difference of twice a number and 2 is at most 22

Zarrin [17]

Nice fact I guess

I don’t know

4 0

2 years ago

7.5 Cheetah Speed and reasoning

Anika [276]

Answer: whats the queation

Step-by-step explanation:

3 0

3 years ago

A boat can travel 21mph in still water. If it travels 270 miles with the current in the same length of time it travels 108 miles

erica [24]

Answer: the speed of the current is 9 mph.

Step-by-step explanation:

Let x represent the speed of the current.

A boat can travel 21 mph in still water. If it travels 270 miles with the current. It means that the total speed with which the boat travelled with the current is (21 + x) mph.

Time = distance/speed

Time spent by the boat in travelling 270 miles is

270/(21 + x)

In the same length of time, it travels 108 miles against the current. It means that the total speed with which the boat travelled against the current is (21 - x) mph.

Time = distance/speed

Time spent by the boat in travelling 108 miles is

108/(21 - x)

Since the time is the same, then

270/(21 + x) = 108/(21 - x)

270(21 - x) = 108(21 + x)

5670 - 270x = 2268 - 108x

108x + 270x = 5670 - 2268

378x = 3402

x = 3402/378

x = 9

7 0

3 years ago