Qual o valor das expressões (-5) + (+6) + (-2)?
(-22) - (+8) + (+10)?
(-12) . (+4) : (-2)?

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?