Question 13 (5 points) (09.04 MC)
Using the following equation, find the center and radius:
x2 + 2x + y2 + 4y = 20 (5 points)
1) The center is located at(1, 2), and the radius is 25.
2) The center is located at (-1,2), and the radius is 25.
3) The center is located at (-1, -2), and the radius is 5.
4) The center is located at (1, 2), and the radius is 5.

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

solution:

we have to construct

∠m nt ≅ ∠p qr

the steps to draw this construction are

step 1: use a compass to draw an arc from point q which intersects the side pq at point a and the side qr at point b.

step 2: draw a segment nt and use the same width of the compass to draw an arc from point n which intersects the segment nt at a point x.

step 3:

step 4: join points n and y using a straightedge.

step 3:

option (d).maintaining the same width of the compass as ab, draw an arc from point x such that it intersects the arc drawn from n in a point y.

to draw   congruent angles , 1. width of compasses while drawing two angles should be same i.e from point at which angle has to be drawn, 2.the distance between the two points where the compass intersects the two sides should be same while drawing any two congruent angles.

25/14 or 1.

step-by-step explanation:

the dots mean that it has infinitely more numbers behind it