Bob has seven rare baseball cards in his collection, each valued at $850. which expression shows how to find the total value of all the rare baseball cards? a. (800 x 50) + (800 x 7) b. (800 x 7) +(50 x 7) c (800 x 7) + 7 d. 800 + (50 x 7) and how do you solve it?

Which one ? is the answer and how to find this answer

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

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.