I need someone to help me do this, see attached documents for the questions

1.) 20.2

Step-by-step explanation:

1.) You need to use the distance formula:

Find the distance of A to B first:

B to C:

C to A:

Add distances to find the perimeter:

2.) Part A:

You need to use the mid-point formula:

Part B:

1. Use the slope-intercept formula:

M as the slope, b the y-intercept.

Find the slope of the two points A and B using the slope formula:

Insert slope as m into equation.

Take point A as coordinates and insert into the equation. Solve for the intercept, b:

Insert the value of b into the equation.

2.  Use the mid-point coordinate. Take the slope.

If you need to find the perpendicular bisector, you will take the negative reciprocal of the slope. Switch the sign and flip it. Ex:

Insert the new slope into the slope-intercept equation as m.

Take the mid-point coordinate as (x,y) and insert into the equation with the new points. Solve for b.

Insert the value of b.

$3684 should be invested in stock L

Step-by-step explanation:

Let x represent the amount that you should invest in stock K.

Let y represent the amount that you should invest in stock L.

You have $10,000 to invest in these two stocks. It means that

x + y = 10000

Stock K is expected to return 12.4 percent while the return on Stock L is expected to be 8.6 percent. It means that the returns from stock K would be 12.4/100 × x = 0.124x

And the returns from stock L would be 8.6/100 × y = 0.086y

if you desire a combined return from the two stocks of 11 percent, it means that the combined returns would be

11/100 × (x + y) = 0.11(x + y)

The equation would be

0.124x + 0.086y = 0.11(x + y)- - - - - - - -1

Substituting x = 10000 - y into equation 1, it becomes

0.124(10000 - y) + 0.086y = 0.11(10000 - y + y)

1240 - 0.124y + 0.086y = 1100

- 0.124y + 0.086y = 1100 - 1240

- 0.038y = - 140

y = - 140/- 0.038

y = 3684