x=number of members
y=number of non-members
total peple was 239 so x+y=239
total collected was 593 so 2x+3y=593
we have 2 equations, 2 unknowns
x+y=239
2x+3y=593
elimination
multiply 1st equation by -2
-2x-2y=-478
add to 2nd equation
<u>2x+3y=593 +</u>
0x+1y=115
y=115
solve for x
x+115=239
x=124
124 zoo members and 115 non-members visited the zoo that day
Answer:
77.8743
Step-by-step explanation:
that is the awse if not it should look like 77.874
<2 = 90
If the lines are perpendicular, the angles are 90 degrees
A = -2.2
B = -1.7
C = 1.87
D = 19.97
A = 7.4 - 9.6 = -2.2
B = -2.2 + 0.5 = -1.7
C = -1.1(-1.7) = 1.87
D = 18.1 + 1.87 = 19.97
