Triangle pqr has vertices p(-3 -1) q(-1,-7) and r(3,3) and points a and b are midpoints of segment pq and segment rq respectively. Use coordinate geometry to prove that segment ab is parallel to segment pr and is half the length of segment pr

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Step-by-step explanation:

Be:   p(-3,-1)   q(-1,-7)   r(3,3)

we must find the value of the middle point a and b

remember that distance between two points is:

pq=distance between p and q

qr =distance between q and r

ab is parallel to pr if slope ab is equal to slope pr

finally distance ab is equal to distance pr/2

answer: the answer is 127 degrees

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.