Q.7please answer quickly

Q.7please answer quickly In the given figure, if DE II BC, then what is the length ofAE ? If BC = 5 cm,— what is DE ? 3 cro The mid-øoint of the line segment joining (3a, 6) and (—4, 3a) is u, 2a— I). Find the k'alue of a. 2 Which term of the A.P. 21, 42, 43, 84, ...is 210 ? Also find the sum ofthis AP. 3 Two dice are thrown at the same time and the product of numbers appearing on them notai. Find the probability that the product is less than 9. Cards marked With 13, 14, 1 5, 60 arc placed in a box arid mixed thoroughly. Orr card is at random from the box. Find the probability that the number drawn is (0 a perfect square (if) divisi\lle by 5. Solve : 2 3 9 4 In the given figure, OA x 0B = OC x 01). Prove that : o

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