Answer:
y = 10 , x= -3
Note: I have never hears this called "combination method"
if you research this on-line it is typically called the "elimination" or the "addition" method.
Step-by-step explanation:
5x + y = 5
10x + 3y = 20
~~~~~~~~~~~~~~~~~~~~~
multiply top equation by -2
-10x + -2y = -10
10x + 3y = 20
y = 10
x= -3
You need to find Circumference of each circle so the top is 7cm and the bottom is 5cm
C = pi • diameter
So top is 3.14 • 7 = 21.98
And bottom is 3.14 • 5 = 15.70
Need any more help?
1 = 4 angles
2 = perpendicular
Hope that helped ;)
A = adult
c = children
a + c = 1020 so a= 1020 - c
9a + 4c = 7680
substitute a= 1020 - c into 9a + 4c = 7680
9a + 4c = 7680
9(1020 - c) + 4c = 7680
9180 - 9c + 4c = 7680
-5c = -1500
c = 300
a= 1020 - c
a = 1020 - 300
a = 720
answer: 720 <span>adult tickets were sold</span>
I'm pretty sure its B) 8 × 10^0
