All categories

3 years ago

Brendan is 18 years younger than Miranda. 8 years ago, Miranda was 2 times Brendan’s age. How old is Brendan now

Mathematics

1 answer:

AlexFokin [52]3 years ago

7 0

Answer:

I think Brendan is 22? I'm not sure and im 70% sure im wrong!

Sorry!

You might be interested in

A couch that regularly sells for $450<br> was discounted by 30% off.

vaieri [72.5K]

Answer:

The price after the discount would be $315.

8 0

3 years ago

Not sure how I am supposed to arrive to an answer

ANEK [815]

Integrating both sides once gives

$\dfrac{\mathrm d\mathbf r}{\mathrm dt}=2e^t\,\mathbf i+3e^{-t}\,\mathbf j+4e^{2t}\,\mathbf k+\mathbf c$

where $\mathbf c$ is an arbitrary constant vector. Use the initial condition to find its value:

$\dfrac{\mathrm d\mathbf r}{\mathrm dt}(0)=-\mathbf i+7\,\mathbf j=(2+c_1)\,\mathbf i+(3+c_2)\,\mathbf j+(4+c_3)\,\mathbf k$

$\implies\mathbf c_1=-3\,\mathbf i+4\,\mathbf j-4\,\mathbf k$

Integrate again:

$\mathbf r(t)=2e^t\,\mathbf i-3e^{-t}\,\mathbf j+2e^{2t}\,\mathbf k+\mathbf c_1t+\mathbf c_2$

where $\mathbf c_2$ is another arbitrary vector of constants. Use the other initial condition to determine its components:

$\mathbf r(0)=6\,\mathbf i+\mathbf j+3\,\mathbf k=(2+c_1)\,\mathbf i+(-3+c_2)\,\mathbf j+(2+c_3)\,\mathbf k$

$\implies\mathbf c_2=4\,\mathbf i+4\,\mathbf j+\mathbf k$

Then the particular solution to this ODE is

$\boxed{\mathbf r(t)=(2e^t-3t+4)\,\mathbf i+(-3e^{-t}+4t+4)\,\mathbf j+(2e^{2t}-4t+1)\,\mathbf k}$

5 0

4 years ago

The radius of a circle is 3 cm. Find it's area in terms of pi. 28.27 cm2 is wrong

sladkih [1.3K]

Answer:

9 $\pi$

Step-by-step explanation:

The reason why that is wrong is because it says in terms o pi which means you do NOT multiply pi by the radius squared.

EQUATION FOR AREA OF A CIRCLE: $\pi r^{2}$

When you put it all together you get: $\pi * 3^{2}$ which equals $9\pi$

DO NOT MULTIPLY 9 AND PI. IT'S JUST 9 $\pi$

hope this helped :)

5 0

3 years ago

Find the perimeter of a rectangle whose length is 150 m and the diagonal is 170 m work

hram777 [196]

P=2l+2w
150(2)+170(2)
300+340
640 m

7 0

3 years ago

PLZ HELP!!!

Montano1993 [528]

Answer:

A=1

B=2

c=1

Step-by-step explanation:

7 0

3 years ago