Simplify the expression 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 . a. 2√ 20 − 4√ 7 − 2√ 5 b. 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 c. 2√ 20 − 3√ 7 + 4√ 63 d. 2√ 5 + 9√ 7

Consider the reflection of parallelogram pqrs across the line of reflection, . if rr' = 14, then rz = . if sx = 5, then = 5.

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

Choose the more precise measurement. 26.4 cm or 8.39 cm