Use the diagram below to answer questions 1-4.
Segment Addition Postulate e R 1. If PQ = 7 and PR = 32, find QR. 2. If QR = 58 and PQ = 13, find PR. 3. If PO = x-5, OR = 2x β 1, and PR = 21, find x. 4. If OR = 6x + 1 PR= 14x-13, and PQ = 5x - 2, find PR.
Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?