40 is the height of the boy and the inch is C
Answer:
(- 6, 14 )
Step-by-step explanation:
Given the 2 equations
x + y = 8 → (1)
2x + y = 2 → (2)
Multiplying (1) by - 1 and adding to (2) will eliminate the y- term
- x - y = - 8 → (3)
Add (2) and (3) term by term to eliminate y, that is
x = - 6
Substitute x = - 6 into either of the 2 equations and evaluate for y
Substituting into (1)
- 6 + y = 8 ( add 6 to both sides )
y = 14
solution is (- 6, 14 )
Answer:
(0,-2), (5,0) and (10,2).
Step-by-step explanation:
Given equation is 
.
Now we need to find 3 pairs of solutions in (x,y) form for the given equation.
As is a linear equation so we are free to pick any number for x like x=0, 5, 10
Plug x=0 into , we get:
Hence first solution is (0,-2)
We can repeat same process with x=5 and 10 to get the other solutions.
Hence final answer is (0,-2), (5,0) and (10,2).
6(5y)-y=73 in place of x substitute 5y
30y-y= 73
29y=73
y= 2.52
x= 5(2.52)= 12.6
hope this helps
hope this helps
To solve problems like this, we must simply break it down and read each part carefully. We can also set it up as a math problem to make it easier to visualize.
The elevator starts on the twentieth floor, so we will represent that with 20.
20
It goes down 11 floors, so we can represent that with a -11.
20-11=9
Now we are on floor 9. Then, we go up 5 floors, so we can represent that with a 5.
9+5=14
Using the math above, we can see the elevator is on the 14th floor.
