Heather's father gives her a jar
of pennies. she decided to add
3 pennies to the jar every day.
after 10 days, she counted
462 pennies in all. how many pennies
were in the jar before heather began
adding pennies?

The weight of an object in a particular scale is 175.2 lbs. the measured weight may vary from the actual weight by at most 0.1 lbs. what is the range of actual weights of the object

Jessica and martha each have a bag of cookies with unequal quantities. they have 30 cookies total between the two of them. each of them ate 6 cookies from their bag. the product of the number of cookies left in each bag is not more than 80. how many more cookies will jessica have martha? if x represents the number of cookies jessica started with, complete the statements below.the inequality that describes the relationship between the number of cookies each one of them has is x^2 - x +224 > = 0.jessica has at least cookies more than martha.

Let x = a + bi and y = c + di and z = f + gi. which statements are true?