19 ¿Cuál es el valor de la expresión
algebraica 3x - 5z + 1 cuando r= -0.25 y
z = 2?

Plz me i need i will give a brain

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

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.