Lily owns a restaurant. She changes the menu. She records the number of customers using the restaurant for 15 days after the menu is changed. Her results are shown in the stem-and-leaf diagram.

y=20x

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secant-secant formula:

(whole secant) x (external part) =           (whole secant) x (external part)

(8+y-2) *8=                                           (y+4+6) *6

(y+6)*8 = (y+10) *6

distribute

8y+48 = 6y +60

subtract 6y from each side

2y +48 = 60

subtract 48 from each side

2y = 12

divide by 2

y = 6

sv =     (y+4+6)

sv   = 6+4+6

sv = 16

hi there!

1. define: accuracy

a) how close a measured value is to the actual (true) value.

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