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3 years ago

14

PLS HELP ASAP I WILL GIVE BRANERLIST PLUS 10 POINTS

1 answer:

Alex777 [14]3 years ago

7 0

Answer:

1= 1/9

2=0

3=-9

4=-1

Hope this helps!

Step-by-step explanation:

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Can anyone work me through this and explain how to do this? I'm kinda confused. Subject is: "simplify numerical radical expressi

murzikaleks [220]

1: Its B
4: Its D

Sorry I don't know what how to explain it.

3 0

3 years ago

Consider the following planes. x + y + z = 6, x + 7y + 7z = 6 (a) Find parametric equations for the line of intersection of the

Lelechka [254]

Answer:

a. $x=6,y=-6t,z=6t$

b. $\theta=29.5^{\circ}$

Step-by-step explanation:

We are given that

$x+y+z=6$

$x+7y+7z=6$

a.Substitute z=0

$x+y=6$ ...(1)

$x+7y=6$ ..(2)

Subtract equation (1) from equation (2)

$6y=0$

$y=0$

Substitute y=0 in equation(1)

$x=6$

The point (6,0,0) lie on a line.

$r_0=(x_0,y_0,z_0)=(6,0,0)$

Let $A=$

$B=$

$A\times B=\begin{vmatrix}i&j&k\\1&1&1\\1&7&7\end{vmatrix}$

$A\times B=i(7-7)-j(7-1)+k(7-1)=-6j+6k$

Therefore, the vector $a'=(a,b,c)=$

Line is parallel to vector a' and passing through the point (6,0,0).

The parametric equation is given by

$x=x_0+at,y=y_0+bt,z=z_0+ct$

Using the formula

The parametric equation is given by

$x=6,y=-6t,z=6t$

Angle between two plane

$a_1x+b_1y+c_1z=d_1$

and $a_2x+b_2y+c_2z=d_2$

$cos\theta=\frac{(a_1,b_1,c_1)\cdot (a_2,b_2,c_2)}{\sqrt{a^2_1+b^2_1+c^2_1}\cdot \sqrt{a^2_2+b^2_2+c^2_2}}$

Using the formula

$cos\theta=\frac{(1,1,1)\cdot(1,7,7)}{\sqrt{1+1+1}\times \sqrt{1+7^2+7^2}}$

$cos\theta=\frac{1+7+7}{\sqrt 3\times 3\sqrt{11}}$

$cos\theta=\frac{15}{3\sqrt{33}}}=\frac{5}{\sqrt{33}}$

$\theta=cos^{-1}(0.87)=29.5^{\circ}$

Where $\theta$ in degree.

3 0

3 years ago

At an airport it costs 7 $ to park and 5$ per

OleMash [197]

Answer:

12

Step-by-step explanation:

5 0

3 years ago

Need LETTER A please

8_murik_8 [283]

Another name for x is plane F

8 0

3 years ago

Caroline, Colin & Sarah share some money.

aev [14]

Answer:

Colin gets $\frac{2}{3}$

Step-by-step explanation:

One part is excluded in the problem. That part is:

"Caroline gets $\frac{1}{9}$ of the money."

<u>Solution:</u>

If Caroline gets 1/9th, then remaining is:

$1-\frac{1}{9}=\frac{8}{9}$

Colin and Sarah share in ratio 3 is to 1, that means 3 + 1 = 4 parts...

8/9th in 4 parts means, each part is:

$\frac{\frac{8}{9}}{4}=\frac{2}{9}$

We know Colin gets "3" parts of the total, each part is (2/9)th, so 3 parts would be:

$3*\frac{2}{9}=\frac{6}{9}=\frac{2}{3}$

Colin gets $\frac{2}{3}$

7 0

3 years ago