What is the definition of untrustable?

Round 1500000 to the nearest half million? What do all the angles add up to in a isosceleas? What is the perimeter of a smaller square? A figure that is not a parallelogram with one pair of parallel sides? What number is missing from 57 64 49 63 33 61? X plus Y equals 6 wITHOUT GRAphing does system have one solution or no solution or infinite number of solutions X plus Y equals 9? What is the algebraic expression of 12 less than 5 times y? What do you call a period of a thousand years? 9895 round to the nearest thousand? Rounding 6.7892 to the nearest hundredth? What is 411 rounded to the nearest hundred? What does M mean in shoe size? Is 2 mi greater then 5280 ft? How much bleach in 1 gallon water to make 5 percent solution? There are 8 apples you take 6 how do you have? How did galileo's observation support the heliocentric system? What is LCM of 42 63 162? How much klialiters are in a liter? How much per week is 11 pound per hr 40 hour week? Can a number be both rational and irrational diagram to explain?