A church has 10 bells in its bell tower. Before each church service 7 bells are rung in sequence. No bell is rung more than once. How many possible sequences are there?

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

angle efh= angle egh

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step-by-step explanation:

step-by-step explanation:

let pq = qr = rs = x, and xz = y and zu = z.

if the horizontal lines are parallel, then corresponding segments are in proportion:

substitute:

therefore 3 = y = z.

xu = y + z → xu = 3 + 3 = 6