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3 years ago

Find the midpoint between -1/11 and 9/11

Mathematics

1 answer:

zmey [24]3 years ago

3 0

I think 4.5 is the answer but i don’t know

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Please help i will give Brainlist

Anit [1.1K]

Answer:

below.

Step-by-step explanation:

Value of y/x

a) 1

b) 1

c) 1

7 0

2 years ago

HELP ASAP!!! EXTRA POINTS!!!

Burka [1]

Answer:

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

If 40%of an amount is $24, calculate 100%

Andreas93 [3]

Hey!!

here is your answer >>>

Let's take the total amount as 'X'

Then,

(40/100)X = 24

2x /5 = 24

x = (24*5)/2

x = 12*5

x = 60!.

100% is 60

Hope my answer helps!

8 0

3 years ago

Write down the explicit solution for each of the following: a) x’=t–sin(t); x(0)=1

Kay [80]

Answer:

a) x=(t^2)/2+cos(t), b) x=2+3e^(-2t), c) x=(1/2)sin(2t)

Step-by-step explanation:

Let's solve by separating variables:

$x'=\frac{dx}{dt}$

a) x’=t–sin(t), x(0)=1

$dx=(t-sint)dt$

Apply integral both sides:

$\int {} \, dx=\int {(t-sint)} \, dt\\\\x=\frac{t^2}{2}+cost +k$

where k is a constant due to integration. With x(0)=1, substitute:

$1=0+cos0+k\\\\1=1+k\\k=0$

Finally:

$x=\frac{t^2}{2} +cos(t)$

b) x’+2x=4; x(0)=5

$dx=(4-2x)dt\\\\\frac{dx}{4-2x}=dt \\\\\int {\frac{dx}{4-2x}}= \int {dt}\\$

Completing the integral:

$-\frac{1}{2} \int{\frac{(-2)dx}{4-2x}}= \int {dt}$

Solving the operator:

$-\frac{1}{2}ln(4-2x)=t+k$

Using algebra, it becomes explicit:

$x=2+ke^{-2t}$

With x(0)=5, substitute:

$5=2+ke^{-2(0)}=2+k(1)\\\\k=3$

Finally:

$x=2+3e^{-2t}$

c) x’’+4x=0; x(0)=0; x’(0)=1

Let $x=e^{mt}$ be the solution for the equation, then:

$x'=me^{mt}\\x''=m^{2}e^{mt}$

Substituting these equations in c)

$m^{2}e^{mt}+4(e^{mt})=0\\\\m^{2}+4=0\\\\m^{2}=-4\\\\m=2i$

This becomes the solution m=α±βi where α=0 and β=2

$x=e^{\alpha t}[Asin\beta t+Bcos\beta t]\\\\x=e^{0}[Asin((2)t)+Bcos((2)t)]\\\\x=Asin((2)t)+Bcos((2)t)$

Where A and B are constants. With x(0)=0; x’(0)=1:

$x=Asin(2t)+Bcos(2t)\\\\x'=2Acos(2t)-2Bsin(2t)\\\\0=Asin(2(0))+Bcos(2(0))\\\\0=0+B(1)\\\\B=0\\\\1=2Acos(2(0))\\\\1=2A\\\\A=\frac{1}{2}$

Finally:

$x=\frac{1}{2} sin(2t)$

7 0

4 years ago

Often multiple processing steps are required for data frames, but the intermediate results are often not that important. There a

Ulleksa [173]

Answer:

a. True

Step-by-step explanation:

The data frames is the sorting of data into small frames and clearing out raw data which makes the data important for the user. The input values are inserted by the user as the statement and the statements are interpreted as the values and the results are shown.

4 0

3 years ago