Is the line through points P(2,-9) and Q(6, -13) perpendicular to the line through points R(5,-1) and S(1,-5)? Explain

yes they are perpendicular to eachother because when both the lines cross it makes a right angle 90 degrees making it perpendicular

Step-by-step explanation:

answer: for each 3 girls there is 2 boys . 3: 2

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7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐