a bell tolls every 10 minutes. another bell tolls every 15 minutes. both bells toll at 6:00pm. they will toll together at what t
2 answers:
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Answer:
see explanation
Step-by-step explanation:
first we calculate the slopes of EF and FG using the slope formula
m =
with (x₁, y₁ = E (7, 7 ) and F (4, 8 )
=
=
= -
repeat with (x₁, y₁ ) = F (4, 8 ) and (x₂, y₂ ) = G (2, 2 )
=
=
= 3
if 2 lines are perpendicular then the product of their slopes = - 1
here
×
= -
× 3 = - 1
then EF is perpendicular to FG