g An appliance store sells three different brands of refrigerators. Of the refrigerator sales, 40% are brand 1, 25% are brand 2 and 35% are brand 3. Each manufacturer offers a 1-year warranty on parts and labor. It is known that 20% of brand 1's require warranty repair work, whereas the corresponding percentages for brands 2 and 3 are 25% and 10%, respectively. What is the probability that a randomly selected purchaser has a refrigerator that will need repair while under warranty

step-by-step explanation:

the triangles are similar. therefore the corresponding sides are in proportion:

              cross multiply

            divide both sides by 32

a

step-by-step explanation:

given the 2 equations

- x + y = - 2 → (1)

2x - 3y = 4 → (2)

multiplying (1) by 2 and adding to (2) will eliminate the x- term

- 2x + 2y = - 4 → (3)

add (2) and (3) term by term

(2x - 2x) + (- 3y + 2y) = (4 - 4), simplifying gives

- y = 0 ⇒ y = 0

substitute y = 0 in either of the 2 equations for corresponding value of x

substituting in (2) gives

2x = 4 ( divide both sides by 2 )

x = 2

solution is (2, 0 ) → a