Agroup of college students are volunteering for the homeless during their spring break. they are putting the finishing touches on a house they built. working alone, irina can paint a certain room in 7 hours. paulo can paint the same room in 6 hours. write an equation that can be used to find how long it will take them working together to paint the room. how many hours will it take them to paint the room? if necessary, round your answer to the nearest hundredth.

What is the missing step in this proof ?

Statement reason 1. δabc is similar to δced. given 2. 3. definition of slope 4. slope of slope of definition of slope 5. slope of × slope of multiplying the slopes 6. slope of × slope of substitution property of equality 7. slope of × slope of simplifying the right side the table contains the proof of the relationship between the slopes of two perpendicular lines. what is the reason for statement 2? a. parallel line segments that meet a common perpendicular line are proportional in length. b. the lengths of vertical and horizontal sides in congruent triangles are in a common ratio. c. trigonometric identities determine the lengths of the legs in a right triangle. d. corresponding side lengths in similar triangles are proportional in length.

What expression is equivalent to (84+16)