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Earn +20 ptsQ: Is 1131 a composite
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Is 1131 prime?
1131 is composite.
What is 1.655 as a fraction?
1131/200
A student weighs 1131 pennies and finds them to have a mass of 3001.8 g If the pre-1982 pennies weigh on average 3.09 g and the post-1982 pennies weigh 2.51 g how many of the pennies are post-1982?
Of 1131 pennies, x weigh 3.09 g and y weigh 2.51 g. In total, the 1131 pennies weigh 3001.8 g. 3.09x + 2.51y 1131 = 3001.8 I have no idea what to do after that, or if it's even right. I was thinking maybe dividing, but the number was so small it had to be wrong. Tell me, what grade is this for?
Is 21 a prime or composite?
21 is composite.
Is 27 a composite or a prime?
27 is composite.
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