What is the surface area of the triangles prism? ? 13 points give the right answer

First, let's calculate the triangles of the prism.

The area of a triangle is base times height, then divide by 2.

So:

(7*8)/2.

This would give us 28.

Also knowing that there are two triangles on the prism, we have to multiply 28 by 2. This would give us 56.

Now, for the rectangles, we have to find their areas.

The area of a rectangle is length times width. So this would give us:

8*16.

This equals 128.

Next, knowing that there are three rectangles, multiply 128 by three. This gives us 384.

Now, we jus have to add all the areas together:

384+56 = 440

So the prism's surface area is 440cm^2

Hope this helps. If you have any questions, please put them in the comments below.

y = -7/6x + b

Step-by-step explanation:

Perpendicular lines require the reciprocal of the slope and opposite sign to the original slope. Then, you substitute the x and y coordinates into the equation to find the y-intercept. Done.

y = 6/7x -7     (6,3)

y = -7/6x + b

3 = -7/6(6) + b

3 = -7 + b

7     7

10 = b

y = -7/6x + b