All categories

3 years ago

Please help I’m a bit stuck :)

Mathematics

2 answers:

Yuliya22 [10]3 years ago

5 0

The side lengths are 11

tiny-mole [99]3 years ago

3 0

Answer:

All side lengths are 11 because it is a square and all of the sides are equal. But I'm not sure about the angles

You might be interested in

P = 2Q + R/R. find P when R = Q

Lisa [10]

Answer:

Step-by-step explanation:

R=Q

P=2Q+R/R

P=2R+R/R

P=3R/R

P=3

6 0

3 years ago

If a^2+1/a^2=79 where (a>0), find the value of a^3 +1/a^3

Nastasia [14]

Note the binomial expansion,

(a + 1/a)³ = a ³ + 3a + 3/a + 1/a ³

a ³ + 1/a ³ = (a + 1/a)³ - 3 (a + 1/a)

Similarly,

(a + 1/a)² = a ² + 2 + 1/a ²

We're given a ² + 1/a ² = 79, so

(a + 1/a)² - 2 = 79

(a + 1/a)² = 81

a + 1/a = ±9

but a > 0, so we ignore the negative solution.

Then

a ³ + 1/a ³ = 9³ - 3×9 = 702

7 0

3 years ago

lana66690 [7]

Answer:

I don't know

Step-by-step explanation:

Because you are in college and that's what it says!!

5 0

3 years ago

Identify a possible first step using the elimination method to solve the system and then find the solution to the system. 3x + 2

mrs_skeptik [129]

A) Multiply second equation by 2, solution

8 0

3 years ago

Evaluate the given integral by making an appropriate change of variables. 10 x ? 5y 8x ? y da, r where r is the parallelogram en

Artyom0805 [142]

Take

$\begin{cases}u=x-5y\\v=8x-y\end{cases}$

so that you have

$\begin{cases}\mathbf x(u,v)=\dfrac{-u+5v}{39}\\\\\mathbf y(u,v)=\dfrac{-8u+v}{39}\end{cases}$

which gives a Jacobian determinant of

$|\det J|=\left|\begin{vmatrix}\mathbf x_u&\mathbf x_v\\\mathbf y_u&\mathbf y_v\end{vmatrix}\right|=\dfrac1{32}$

So upon transforming the coordinates to the u-v plane, you have (and I'm guessing on what the integrand actually is)

$\displaystyle\iint_R(10x-5y)(8x-y)\,\mathrm dA=\frac1{32}\int_{u=0}^{u=2}\int_{v=5}^{v=10}\frac5{13}(2u+3v)v\,\mathrm dv\,\mathrm du$
$=\displaystyle\frac5{416}\int_{u=0}^{u=2}\int_{v=5}^{v=10}(2uv+3v^2)\,\mathrm dv\,\mathrm du=\dfrac{2375}{104}$

4 0

4 years ago