All categories

3 years ago

Plz Wegnerkolmp2741o help me

Mathematics

1 answer:

d1i1m1o1n [39]3 years ago

8 0

Answer:

a = 7/6 a = -1/5

Step-by-step explanation:

30 a^2 - 7 = 29a

Subtract 29a from each side

30 a^2 -29a- 7 = 29a-29a

30 a^2 -29a- 7 = 0

Factor

( -7 ) ( +1) =0 to get -7

We need to determine what goes in the first part

5*7 = 35 - 6 = 29

( 6a -7 ) ( 5a +1) =0

Using the zero product property

6a -7 =0 5a+1 =0

6a = 7 5a = -1

a = 7/6 a = -1/5

You might be interested in

The angle of elevation from

weqwewe [10]

Answer:

104.5 ft

Step-by-step explanation:

In the picture I uploaded I showed all of the work so yeah!!! :)

5 0

3 years ago

Suppose that surface σ is parameterized by r(u,v)=⟨ucos(3v),usin(3v),v⟩, 0≤u≤7 and 0≤v≤2π3 and f(x,y,z)=x2+y2+z2. Set up the sur

Bad White [126]

Looks like you have most of the details already, but you're missing one crucial piece.

$\sigma$ is parameterized by

$\vec r(u,v)=\langle u\cos3v,u\sin3v,v\rangle$

for $0\le u\le7$ and $0\le v\le\frac{2\pi}3$ , and a normal vector to this surface is

$\dfrac{\partial\vec r}{\partial u}\times\dfrac{\partial\vec r}{\partial v}=\left\langle\sin3v,-\cos3v,3u\right\rangle$

with norm

$\left\|\dfrac{\partial\vec r}{\partial u}\times\dfrac{\partial\vec r}{\partial v}\right\|=\sqrt{\sin^23v+(-\cos3v)^2+(3u)^2}=\sqrt{9u^2+1}$

So the integral of $f(x,y,z)=x^2+y^2+z^2$ is

$\displaystyle\iint_\sigma f(x,y,z)\,\mathrm dA=\boxed{\int_0^{2\pi/3}\int_0^7(u^2+v^2)\sqrt{9u^2+1}\,\mathrm du\,\mathrm dv}$

6 0

2 years ago

Which of the following is the difference of two squares

Roman55 [17]

Answer:

2nd option

Step-by-step explanation:

A difference of squares has the general form

a² - b²

where the terms on either side of the subtraction ( the difference ) are both perfect squares.

The only one fitting this description is

16a² - 4y²

= (4a)² - (2y)² ← difference of squares

7 0

2 years ago

What's the mode and median for 22,36,9,27,30,20

zalisa [80]

Mode: none. All values occur once
Median 24.5

6 0

2 years ago

In a carnival game, there is a 45% probability of winning a prize. Which of the following is true.

JulsSmile [24]

Ok, here is what I got:
<span>9/20 is .45 so D is right for sure. C is also correct since the remaining % is 55 ( meaning the percent you won't win) this is also the same as A which is 11/20 or .55. again meaning that .55 is the probability that you won't win. I hope this helps!</span>

7 0

3 years ago

Read 2 more answers