Exercise 1: Let DABC square at A, D lies between B and C. Draw the points E, F such that AB, AC are the perpendicular bisectors of DE, DF, respectively. a) Prove that E, A, F are collinear.
Hint: Use the angle addition method.
Prove Â1 + Â2 + Â3 + Â4 = 180degrees
b) Prove DE ^ DF
c) Prove BE // CF help me please

Which equation represents the model shown? a)1/3 divide 1/6 = 2 b)2/3 divide 1/6 = 2/18 c)1/3 divide 1/6 = 1/18 d)2/3 divide 1/6 =4

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b. you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c. you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d. you spend $5 plus $10 per week until you have less than $45.

Find the maximum value of p= 4x + 5y subject to the following constraints :