Which describes a situation when an estimation is appropriate? a. margo wants to buy a sweater for $15.98 and a pair of socks for $1.98. she has $20. she wants to know if she has enough money to buy both. b. margo buys a sweater for $15.98 and a pair of socks for $1.98. she gives the cashier $20. the cashier wants to know how much change to give margo.

Which of the following transformations will make coincide with ? a. counter-clockwise rotation 90º about a, followed by a translation 5 units to the right b. translation 5 units to the right, followed by a reflection across the y-axis c. translation 5 units to the right, followed by a reflection across the x-axis d. translation 1 unit up and 5 units to the right, followed by a reflection across the x-axis