7: The football traveled 90 yds total 50+40=90
8: Answer: yes because 12²=144 9²=81 add them and get 225 and 15×15=225
9: x=15ft a^2+b^2=c^2 8^2+b^2=17^2 b^2+64=289 b^2=225 b=15
10: The cat is 12 feet above the ground, and Peter has to put the base of his ladder 9 feet away from the tree because of mud. If we consider a right-angled triangle, in which the height is 12 feet, base is 9 feet.
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