Dentinogenesis imperfecta is a rare, autosomal, dominantly inherited disease of the teeth that occurs in about one in 8000 people (witkop 1957). the teeth are somewhat brown in color, and the crowns wear down rapidly. assume that a male with dentinogenesis imperfecta and no family history of the disease marries a woman with normal teeth. what is the probability that their first child will be a girl with dentinogenesis imperfecta?

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answer: #1 ads up by 8 and i don't know #2

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4y < -4

we need to isolate y. we can do this by simply dividing both sides by 4.

4y ÷ 4 > -4 ÷ 4

simplify.

y > -1

5 - y > 0

once again, we need to isolate y, so we can start off by subtracting 5 from both sides.

5 - y - 5 > 0 - 5

simplify.

-y > -5

divide both sides by -1.

** remember that when dividing any side by a negative, you must switch the sign! **

-y ÷ -1 < -5 ÷ -1

simplify.

y < 5

~hope i ! ~