One person can do a certain job in twenty-one minutes, and another person can do the same job in twenty-eight minutes. how many minutes will it take them to do the job together?

5x−4≥12 or 12x+5≤−4 can you with this problem

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.

Look at the chart showing the results of a baseball player at bat. which is the probability of getting a hit?