RTI & CBA #2 Review

• ( x + 2 )

• ( x - 6 )

• ( x - 4 )

• ( x - 12 )

• ( x + 3 )

Mathematical Equivalence

ON

• 4
• -4
• -2
• 16
• -16
• 12
• -12
• 3
• -3
• 2

Mathematical Equivalence

ON

• 6
• 3
• 2
• -2
• -6
• -3

• 8.5

• -17

• 43

• -12.5

• -6.5

• 0.5

• 6.5

• -0.5

Two customers went to a post office to buy postcards and large envelopes. Each postcard costs the same amount, and each large envelope costs the same amount. - The first customer paid $12 for 14 postcards and 5 large envelopes. - The second customer paid $24.80 for 10 postcards and 15 large envelopes. What was the cost in dollars of each large envelope?

• $1.42

• $0.35

• $1.15

• $0.63

Two customers went to a post office to buy postcards and large envelopes. Each postcard costs the same amount, and each large envelope costs the same amount. - The first customer paid $12 for 14 postcards and 5 large envelopes. - The second customer paid $24.80 for 10 postcards and 15 large envelopes. What was the cost in dollars of each postcard?

• $1.42

• $0.35

• $1.15

• $0.63