Answer:
(P, Q) = (-75, 57)
Step-by-step explanation:
The equation will have infinitely many solutions when it is a tautology.
Subtract the right side from the equation:
Px +57 -(-75x +Q) = 0
x(P+75) +(57 -Q) = 0
This will be a tautology (0=0) when ...
P+75 = 0
P = -75
and
57-Q = 0
57 = Q
_____
These values in the original equation make it ...
-75x +57 = -75x +57 . . . . . a tautology, always true
4x+5y=7
y=3x+9
1) 4x+5(3x+9)=7 2) y=3(-2)+9
y= -6 +9
4x+15x+45=7 y=3
19x+45=7
19x= -38
x= -2
x is -2 and y is 3
5$ per attendee .
25/5 = 5
35/7 = 5
etc.
Answer:
AD = 4.5
Step-by-step explanation:
Since DE is parallel to AC and intersects 2 sides of the triangle it divides those sides in proportion, that is
=
, substitute values
=
( cross- multiply )
8AD = 36 ( divide both sides by 8 )
AD = 4.5
Answer:
27 and 23
Step-by-step explanation: