In the figure, ab| |cd. ∠aeb and ∠ced are congruent __1__ . ∠aec and ∠ __2__ are congruent by the vertical angles theorem.1. a. by the linear pair theorem. b. by the vertical angles theorem. c. because they are corresponding angles for parallel lines cut by a transversal. 2. a. aebb. bed c. ecd d. eba

With finding limits of multi variable !

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0)

The investigating team suspected that there were differences in the cost of repairing cars in workshop i and workshop ii. the investigating team suspected that the costs raised by workshop i were greater than workshop ii. for that they tested the repair of 15 cars in each workshop to see the cost of repairs. the decision of the right hypothesis to prove the suspicion above is a. h0 : μ1- μ2­ = 0; ha : μ1- μ2­ ≠ 0 b. h0 : μ1- μ2 ≥ 0; ha : μ1- μ2 < 0 c. h0 : μd ≥ 0; ha : μd < 0 with μd = μ2- μ1 d. h0 : μd = 0; ha : μd ≠ 0 with μd = μ2- μ1 e. h0 : μ1- μ2 = 0; ha : μ1- μ2 ≥ 0