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Contact [7]
3 years ago
12

Which of the following statement is false?

Mathematics
2 answers:
Ivanshal [37]3 years ago
8 0

Answer:

C is False

Step-by-step explanation:

A complex number is represented by

z = a + bi

A imaginary number is represented by

z = bi

A complex number could include a real number so it cant be a pure imaginary number so C is False.

Setler79 [48]3 years ago
7 0

Answer:

c not all complex are imaginary

but all imaginary are complex

please brainlist

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Prove the identity sin4x=2sin2xcos2x
Musya8 [376]
There is a trig identity called the sum of 2 angles for sin its<span>
sin(a+b)=sin(a)cos(b)+cos(a)(sin(b)
</span>
You will need to use it. So in your question split the 4x in 2 equal parts 2x and 2x
 <span>
</span><span>sin(4x)=sin(2x+2x)

</span>Now using the expansion above you will get

<span>sin(2x+2x)=sin(2x)×cos(2x)+cos(2x)×sin(2x)

</span>And it will simplify to 

<span><span>2sin(2x)cos(2x)

I hope this helps you! Good luck :)</span></span>
5 0
3 years ago
Read 2 more answers
Help please and show the steps! thank you!​
san4es73 [151]

Answer:

#1.  x = -1

Answer = 8

#2. x = 1/5

Answer = 344/25

#3. x = 14

Answer =  13328

Step-by-step explanation:

#1. a. plug in -1

f(-1)= (5(-1)^3) - (2(-1)^2 - (-1) + 14

b. Solve the exponents.

(5(-1)^3)

(5x-1)

(-5) - (2(-1)^2) - (-1) + 14

(2(-1)^2)

(2x1)

(-5) - (2) - (-1) +14

c. simplify.

(-5) - (2) + 1 + 14

-7 + 15

8

#2.

f(1/5)= (5(1/5)^3) - (2(1/5)^2 - (1/5) + 14

(5(1/5)^3)

(5 x 1/125)

(1/25) - (2(1/5)^2)

(2 x 1/25)

(2/25)

(1/25) - (2/25) - (1/5) +14

(-1/25) - (1/5) +14

Note: (1/5) turns into (5/25) so it can be subtracted.

-6/25 + 14

Note: 14 turns into 350/25 so it can be added.

350/25 - 6/25 = 344/25

#3.

f(14)= (5(14)^3) - (2(14)^2 - (14) + 14

Note: Normally you do the exponents first but I'm just going to casually take out the two 14s at the end cause they cancel each other out.

f(14)= (5(14)^3) - (2(14)^2)

( 5 (14^3))

(5 x  2744)

(13720) - (2(14^2))

(2 (14^2))

(2x196)

392

(13720) - 392

13328

Good Luck!

3 0
3 years ago
For the first 3% of Hanna's salary, her employer matches 100% of her 401(k) contributions, and from 3% to 12%, Hanna's employer
AleksAgata [21]

Answer:

My apex said 3000..idk if you need it anymore. I have no idea how to solve it either.

Step-by-step explanation:


3 0
3 years ago
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You bought a car for $20,000. You have owned it for one year, and it is now worth $16,000. What is the percent decrease in your
Ganezh [65]
I think it'd be 20%.. I could be wrong. 
7 0
3 years ago
Read 2 more answers
Acme annuities recently offered an annuity that pays 4.7% compound monthly. What equal monthly deposit should be made into this
Ksivusya [100]
Formula for Compound Interest

Amount = Principal * (1 + Rate/100)^Time
A = P * (1 + R/100)^T
P = A/((1 + R/100)^T) = 92000/((1 + 4.7/100)^16) = $44120.5503
4 0
3 years ago
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