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3 years ago

3X + 13 = 5 solve for X

Mathematics

1 answer:

Setler79 [48]3 years ago

4 0

X=-8/3... hope I helped

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The number 16 has four fourth roots. In other words, there are four complex numbers that can be entered in the square in the equ

Tems11 [23]

Answer:

Step-by-step explanation:

Hello, we know that the z complex solutions of

$z^4=1$

are

1, i, -1, -i

so, the solutions of $z^4=16=2^4$ are

2, 2i, -2, -2i

Thank you

3 0

4 years ago

I will give an easy Brainliest! Thank you! :D

zavuch27 [327]

Answer:

r (100) = 10*p (10)

Step-by-step explanation:

r= 100 pieces of candy

10=10

p=10 pieces of candy

r (100) = 10*p (10)

4 0

3 years ago

Last year, Keiko had $20,000 to invest. She invested some of it in an account that paid %7 simple interest per year, and she inv

erma4kov [3.2K]

Answer:

$P_2 = \$6,000\\P_1 = \$14,000$

Step-by-step explanation:

The formula of simple interest is:

$I = P_0rt$

Where I is the interest earned after t years

r is the interest rate

$P_0$ is the initial amount

We know that the investment was $20,000 in two accounts

_______________________________________________

For the first account r = 0.07 per year.

Then the formula is:

$I_1 = P_1r_1t$

Where

$P_1$ is the initial amount in account 1 at a rate $r_1$ during t = 1 year

$I_1 = P_1(0.07)(1)\\\\I_1 = 0.07P_1$

For the second account r = 0.05 per year.

Then the formula is:

$I_2 = P_2r_2t$

Where

$P_2$ is the initial amount in account 2 at a rate $r_2$ during t = 1 year

Then

$I_2 = P_2(0.05)(1)\\\\I_2 = 0.05P_2$

We know that the final profit was I $1,280.

$I = I_1 + I_2=1,280$

Substituting the values $I_1$ , $I_2$ and I we have:

$1,280 = 0.07P_1 + 0.05P_2$

As the total amount that was invested was $20,000 then

$P_0 = P_1 + P_2 = 20,000$

Then we multiply the second equation by -0.07 and add it to the first equation:

$0.07P_1 + 0.05P_2 = 1.280\\.\ \ \ \ \ \ \ \ +\\-0.07P_1 -0.07P_2 = -1400\\-------------$

$-0.02P_2 = -120\\\\P_2 = 6,000$

Then $P_1 = 14,000$

4 0

3 years ago

Steve was offered $5025 per year for a weekend life guarding job at a local pool.He wants to know how much his monthly income wi

Llana [10]

Steve's monthly income will be $418.75 per month at this salary level, because $5025 / 12 months equals $418.75 per month.

6 0

4 years ago

What is the answer to this

nadya68 [22]

D is the answer to the question

4 0

3 years ago