Why aren’t the two samples given in Table 1 and Table 2 exactly the same? Why do the two tables lead to slightly different results in the calculations?

Kevin and randy muise have a jar containing 78 coins, all of which are either quarters or nickels. the total value of the coins in the jar is $13.90. how many of each type of coin do they have?

The volume of a cube is 8 in to the 3rd power. how long is each side?

Which of the following is correct interpretation of the expression -4+13