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3 years ago

I need help with this please need to turn this in today

Mathematics

1 answer:

Misha Larkins [42]3 years ago

4 0

Answer:

a) 75 m lower

b) 308 m

Step-by-step explanation:

a) -131 - -206 = 75

b) -206 + 514 = 308

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Which simplifications of the powers of i are correct? There may be more than one correct answer.

fredd [130]

$\bf i^2=-1\qquad\qquad i^3=-i\qquad \qquad i^4=1 \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ i^{22}\implies i^{(4\cdot 5)+2}\implies i^{4\cdot 5}i^2\implies (i^4)^5 i^2\implies 1^5(-1)\implies -1~\dotfill \bigotimes \\\\\\ i^{11}\implies i^{(2\cdot 5)+1}\implies (i^2)^5 i\implies (-1)^5(i)\implies -i~\dotfill \checkmark$

$\bf i^{21}\implies i^{(4\cdot 5)+1}\implies (i^4)^5 i\implies 1^5(i)\implies i~\dotfill \checkmark \\\\\\ i^{12}\implies i^{3\cdot 4}\implies i^3 i^4\implies (-i)(1)\implies -i\dotfill \bigotimes \\\\\\ i^{20}\implies i^{4\cdot 5}\implies (i^4)^5\implies 1~\dotfill \checkmark \\\\\\ i^{26}\implies i^{(4\cdot 6)+2}\implies (i^4)^6 i^2\implies 1^6(-1)\implies -1\dotfill \checkmark \\\\\\ i^{27}\implies i^{(4\cdot 6)+3}\implies (i^4)^6 i^3 \implies 1^6(-i)\implies -i\dotfill \bigotimes$

6 0

3 years ago

Solve each equation. List any restrictions. Check your solutions. 12/x+11=17

Thepotemich [5.8K]

12+11x=17x11x+12=17x
(both sides of the equation)
11x+12−17x=17x−17x
(Subtract 17x from both sides)
−6x+12=0−6x+12−12=0−12
(Subtract 12 from both sides)
−6x=−12−6x−6=−12−6
(Divide both sides by -6)
x=2
Check answers. (Plug them in to make sure they work.)
x=2
(Works in original equation)

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2 years ago

If x is a positive integer then 2(x)³ = 8x 8x³ 6x³ 2x³ 6x

marysya [2.9K]

It is equal to 2(x)^3 because pemdas, exponnets come before multiplication so it would be x^3 then multiply whatever that is by 2

2x^3 is answer (4th choice)

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3 years ago

kemdrick is an ecologist he spends 8 hours on friday how many hours he spending on saturday to average 11 hours per day

Sidana [21]

Answer:

$\boxed{13}$

Step-by-step explanation:

Let x = hours worked on Saturday

Then x + 8 = total hours on Friday and Saturday

$\text{Average} = \dfrac{ \text{total hours}} {\text{number of days}}\\\\11 = \dfrac{x + 8}{2}$

22 = x + 8

x = 13

Kendrick is working $\boxed{13}$ hours on Saturday.

5 0

2 years ago

Decrease £1280 by 60%

klemol [59]

Hi rainy here !!! so lets see lets set up your problem like this

X/1280 = 60%/100 so lets cross multiply

100 times X =100X

60 times 1280 = 76800

100X=76800 now lets divide each side by 100

100 divided by 100 = 0

76800 divided by 100 = 768

X=768

So now we have to subtract to get the total amount so 1280 minus 768 = 512

512 is your answer :)

Hope I helped if u have any questions on how I did your problem feel free to message me or comment on my page bye !!!

Love ~Rainy~

7 0

3 years ago