Why can you use addition to check your substraction

Zoe needs to buy beads to make jewelry. For each earring, Zoe uses 3 small blue beads, 1 small matalic bead, and 2 large green beads. What is the total number of beads Zoe will need to buy to make 8 pairs of earrings?

Customer deposits $1,000 in an account in which the interest is compounded annuallyThe table below shows the balances in the account at the end of each year.

A 747 jet flew 1744 miles in 3.2 hours. A 787 jet flew 1325 miles in 2.5 hours. Which jet had the fastest constant speed / How much faster.

What is 15+cj to the 3rd power when c=6 and j=5

Jakob is asked to simplify the expression - 3a + 4b + 5a + (-7b). He writes: - 3a + 4b + 5a + (-7b) = - 3a + 5a + 4b + (-7b).

What was considered the greatest American victory of the War of 1812? A) The Battle of New Orleans B) The Battle of Lake Erie C) The Battle of Tippecanoe D) The Battle of Thames

Solve for π in S=2πrh

how do ypu slove dis? y^2 (q-4) - c (q - 4)

What is the equation for an arithmetic sequence with the first term of 7 and the second term of 3

The sum of two numbers is 35. The greater number is 1 less than 6 times the smaller number. What are the two numbers