REVISION EX
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Use the commutative and associative laws to find
the sum of each of the following expressions.
(a) 74 + 39 + 56 (b) 87 +59 +63
(c) 59 +87 +31 (d) 98 +65 + 42

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

Jane has 5 nickels.john has 3 dimes.jane says she has a greater amount of money.with the information given,is she correct?