The average (arithmetic mean) of k scores
is 20. the average of 10 of these scores
is 15. find the average of the remaining
scores in terms of k.
(a) 20k +150/10
(b) 20k -150/10
(c) 150-20k/10
(d) 150 - 20k/k-10
(e) 20k -150/k-10

Use the following statements to write a compound statement for the conjunction or disjunction. then find its truth value. p: an isosceles triangle has two congruent sides. q: a right angle measures 90° r: four points are always coplanar. s: a decagon has 12 sides. a) a right angle measures 90° or an isosceles triangle has two congruent sides; true. b) a right angle measures 90° and an isosceles triangle has two congruent sides; true. c) a right angle measures 90° and an isosceles triangle does not have two congruent sides; false. d) a right angle measures 90° or an isosceles triangle does not have two congruent sides; true.