140 / 100 * X = 56
X = 56 * 100 / 140 = 5600 / 140 = 40
This can be solve by 3 variable equation
let x be the money of luke
y money of rachel
z money of daniel
first equation
x = y + 21
second equation
x = z + 48
third equation
x + y + z = 168
solving simultaneously
x =79
y = 58
z = 31
Let number of adult tickets be a , therefore number of student ticket be a+4 .
And total cost of the tickets is 58, that is
Distributing 2.50 on a+4
Combining like terms
Number of adult tickets are 8 and number of students tickets are 12.
That is an easy question.The answer to that is -15+112i.
Answer:
Step-by-step explanation:
x = 180 - 72 = 108° (linear pair)
y = 72° (vertically opposite angles)
z = 180 - (90+72) = 180 - 162 = 18°