Answer:
The numbers are 4 and 7
Step-by-step explanation:
To start, we can set up two equations.
x + y = 11 and x - y = 3
We now need to solve for one of these variables in terms of the other. I am choosing to solve for x, but either way will work. I'm using the second equation and solving for x by adding y to each side, which gives me
x = 3 + y
Now that I have a value for x, I can plug this into my first equation
3 + y + y = 11
Combining like terms gives me
3 + 2y = 11
Subtracting 3 from both sides leaves
2y = 8
And dividing by 2 to solve for y gets
y = 4
We now know one number, and to solve for the other we can plug our y value into either equation
x + 4 = 11
Subtracting 4 from both sides yields the x value
x = 7
So the two numbers are 4 and 7
Answer:
J) -4.5
Step-by-step explanation:
-12x=54
x=54÷(-12)
x=-4.5
70% of the people were adults
First you subtract 1500-450 = 1050
Then you divide 1050/1500 = .7
Left side: (equation) 2/x=3/90 (multiply them together by cross multiplying. 90x2 divided by 3)
=60
Altogether: 90 (right) + 60 (left) =150 seats in total
