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2 years ago

Can y’all help me on question 19

Mathematics

1 answer:

Zolol [24]2 years ago

6 0

C is your answer. Because 8 times 1.75$ = $14.00 and 5 times 1.25= $6.25. So $14.00+ $6.25 = $20.25

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Consider a series circuit consisting of a resistor of R ohms, an inductor of L henries, and variable voltage source of V(t) volt

ser-zykov [4K]

Answer:

$I(t)=\frac{1}{3}(1-e^{-30t})$

Step-by-step explanation:

We are given that

$\frac{dI}{dt}+\frac{R}{L}I=\frac{V(t)}{L}$

R=150 ohm

L=5 H

V(t)=10 V

$P=\frac{R}{L}=\frac{150}{5}=30$

$I.F=e^{\int Pdt}=e^{\int 30 dt}=e^{30 t}$

$I(t)\times I.F=\int e^{30 t}\times 10 dt+C$

$I(t)\times e^{30 t}=\frac{10}{30}e^{30 t}+C$

$I(t)=\frac{1}{3}+Ce^{-30 t}$

I(0)=0

Substitute t=0

$0=\frac{1}{3}+C$

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

Substitute the values

$I(t)=\frac{1}{3}-\frac{1}{3}e^{-30 t}$

$I(t)=\frac{1}{3}(1-e^{-30t})$

5 0

3 years ago

Sophia used the Order of Operations to simplify 4(5 - 2) to 4x3.

Alchen [17]

Answer:

Step-by-step explanation:

Order of operations, use the operation within the parenthesis:

1) 5 - 2 = 3
2) 4*3 = 12

Distributive property, a(b + c) = ab + ac:

1) 4*5 - 4*2 = 20 - 8
2) 20 - 8 = 12

Both ways are correct and lead to same result

5 0

2 years ago

6y + 2x = 24 and 2y – x = -2

Vladimir [108]

( 6 , 2)

in other words :
x = 6 , y = 2

7 0

2 years ago

Find the future value of the principal. help me pls :(

Vitek1552 [10]

Answer:

54,000

Step-by-step explanation:

30,000/8% then multiply the answer by 10 than add that to 30,000

3 0

2 years ago

How to multiply 20 times 28 and take away 2

MaRussiya [10]

Answer:

558

Step-by-step explanation:

First you multiply 20 by 28, you'll get 560. then you subtract two and you'll end up with 558

6 0

3 years ago

Read 2 more answers