2 years ago

Please help its math

Mathematics

1 answer:

Masteriza [31]2 years ago

4 0

Answer:

the 3rd

Step-by-step explanation:

because n^2+3n+2n simplifies to n(n+5), which is not equivalent to 6n

You might be interested in

Find the inverse Laplace transform f(t) of the function F(s). Write uc for the Heaviside function that turns on at c, not uc(t).

zzz [600]

Answer:

F(t) $=\frac{-1}{2}e^{7(t-7)}+\frac{1}{2}e^{-7(t-7)}$

Step-by-step explanation:

We have given $F(S)=\frac{7e^{-7s}}{s^2-49}$

Now $F(S)=e^{-7s}G(s)$

Here $G(S)=\frac{7}{S^2-49}$

Now first find the Laplace inverse of G(S)

Using partial fraction

$\frac{7}{(s+7)(s-7)}=\frac{A}{(S+7)}+\frac{B}{S-7}$

$7=A(S-7)+B(S+7)$

On comparing the coefficient

$A=\frac{1}{2}$ and $B=\frac{-1}{2}$

On putting the value of A and B

$G(S)=\frac{-1}{2(S+7)}+\frac{1}{2(S+7)}$

Taking inverse Laplace

$G(t)=\frac{-1}{2}e^{7t}+\frac{1}{2}e^{-7t}$

Now in G(s) there is onether term $e^{-7s}$

So F(t) $=\frac{-1}{2}e^{7(t-7)}+\frac{1}{2}e^{-7(t-7)}$

6 0

2 years ago

Orignal Price =$20 % Markup = 22% Whats my answer? ASAP!

I am Lyosha [343]

Answer:

$20 x 122% = $24.40

or look at it this way:

$20 x 1.22 = $24.40

Step-by-step explanation:

6 0

2 years ago

At a convention for lawyers it was known that of the 100 present, at least one was honest, yet if you met any two of the lawyers

Temka [501]

From the given condition, there is only one honest lawyer present.

5 0

3 years ago

There are 5 red marbles, 2 Green marbles and 3 black marbles. What is the probability that red or black is chosen?(answer in dec

ANEK [815]

Answer:

Step-by-step explanation:

5 red marbles, 2 Green marbles and 3 black marbles = 10 marbles

P (red or black) = number of red or black/ total

= (5+3)/10

=8/10

decimal form = .8

5 0

2 years ago

Read 2 more answers

The half-life of a certain radioactive material is 83 hours. An initial amount of the material has a mass of 67 kg. Write an exp

Anvisha [2.4K]

Answer:

Initial amount of the material is 67 kg
Hal-life is 83 hours

The required equation is:

m(x) = 67 * $(1/2)^{x/83}$ , where m- remaining amount of the radioactive material, x - number of hours

After 5 hours the material remains:

m(5) = 67 * $(1/2)^{5/83}$ = 64.260 (rounded)

4 0

2 years ago