15. Challenge! Find the surface area of the figure below.

2x + y -z=9 -x + 6y + 2z =- 17 5x + 7y +z = 4

Effectus [21]

Answer:

Step-by-step explanation:

What is y?

3 0

2 years ago

sorry again for asking this but can someone explain this and give me the answer. Been having a hard time learning this.

Rudik [331]

Hey!!!

In question no.4, we have to subtract the equation.

In question no.5 we have to add the equation.

Hope it will help you...

<h3>Have a great day</h3>

3 0

2 years ago

PLEASE HELP ME!!! I WILL GIVE ALL THESE POINTS

WINSTONCH [101]

<h2>Answer and Explanation to questions 13,14,15</h2>

13) $\mathbf{\overline{XY}\cong\overline{CD}}$ as given in the question.

14) $\mathbf{\overline{XY}\cong\overline{YZ}}$ Since Y is the midpoint of XZ. So, Y will divide XZ in equal halves into XY and YZ.

15) $\mathbf{\overline{CD}\cong\overline{YZ}}$

$\because\overline{\textrm{XY}}\cong\overline{\textrm{CD}}$ and $\overline{\textrm{XY}}\cong\overline{\textrm{YZ}}$ . So, $\overline{\textrm{CD}}\cong\overline{\textrm{YZ}}$

<h2>Answer and Explanation to questions 16,17,18</h2>

∠3 is supplementary to ∠1 means: ∠3 + ∠1 = 180°

And, according to figure ∠1 + ∠2 = 180° as ∠1 and ∠2 form a straight line.

∠3 + ∠1 = 180° .............(i)

∠1 + ∠2 = 180° .............(ii)

subtracting equation (i) and (ii) will give ∠3 = ∠2 ..........(iii)

15) ∠3 is supplementary to ∠1 as given in the question

16) ∠2 is supplementary to ∠1 as shown be equation (ii)

18) ∠3 ≅ ∠2 as shown by equation (iii)

<h2>Answer and Explanation to questions 19</h2>

∠3 and ∠4 form a straight line. Therefore, ∠3 + ∠4 = 180° .......(i)

∠4 and ∠5 form a straight line. Therefore, ∠4 + ∠5 = 180° .......(ii)

subtracting equation (i) and (ii)

∠3 + ∠4 - (∠4 + ∠5) = 180°-(180°)

∠3 + ∠4 - ∠4 - ∠5 = 180°-180°

∠3 - ∠5 = 0

∴ ∠3 = ∠5 (Hence Proved)

4 0

2 years ago

Which postulate or theorem could be used to prove triangleLMQ is congruent to triangleLNP

Cerrena [4.2K]

I believe the correct answer is B. :)

7 0

3 years ago

Read 2 more answers

Are 5:20 and 15:60 equivalent

Viktor [21]

Yes. When simplifying 15:60 by dividing each side by 3, you get 5:20, which is the same as 5:20.

5 0

3 years ago

Read 2 more answers