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Rachel pulls two tiles out of a bag of black and white tiles without replacing the first tile. The bag has 10 more black tiles than white tiles. Write and simplify an expression that represents the...

an empty jar has a mass of 200 grams.  A full jar contains 110 grams of spice. The company sells n jars filled with spice. Select the best interpretatin of the expression (200+110)n a...

in 5 hours a secretory can address 100 envelopes another secretory can address 100 envelopes in 6 hours how long would it take the secretaries working together to address 300 envelopes

Maria bought 3 pounds of grapes for \$0.90 per pound. How many pounds of oranges costing \$1.25 per pound must she purchase so that the total cost for fruit is \$1 per pound

One pump can drain a pool in 9 minutes. When a second pump is also used, the pool only takes 4 minutes to drain. How long would it take the second pump to drain the pool if it were the only pump in...

a messenger is required to deliver 10 packages per day. each day, the messenger works only for as long as it takes to meet the daily quota of 10 packages. on average the messenger is able to deliver...