Answer:
Number is 61 or 16
Step-by-step explanation:
Let x be the digit at tens place and y be the digit at ones place.
So, the two digit number is 10x+y.
When the digits are reversed, number becomes 10y+x
According to question, the sum of a 2-digit number and the 2-digit number when the digits are reversed is 77
10x+y+10y+x=77
11x+11y=77
x+y=7 (i)
Also, difference of the same two numbers is 45
(10x+y)-(10y+x)=45 or (10y+x)-(10x+y)=45
x-y=5 (ii) or y-x=5 (iii)
Consider equations (i) and (ii)
Put x=y+5 in x+y=7
y+5+y=7
2y=2
y=1
So, x=y+5=1+5=6
So, number = 10x+y=10(6)+1=61
Consider equations (ii) and (iii)
Put y=x+5 in x+y=7
x+5+x=7
2x=2
x=1
So, y=x+5=1+5=6
So, number = 10(1)=6=16
Therefore, number is 61 or 16
I'm fairly sure that the answer is an ecosystom.
Answer:
Line EF
Step-by-step explanation:
Planes intersect at lines
Answer:
Its 22
Step-by-step explanation:
x is 19
so 3+19 is 22
<em><u>True staments are:</u></em>
The y-variable will be eliminated when adding the system of equations
There is only one solution to the system of equations
<em><u>Solution:</u></em>
<em><u>Given system of equations are:</u></em>
x + 6y = 16 ----- eqn 1
8x - 6y = -2 ---- eqn 2
We have to solve the system of equations
When we add eqn 1 and eqn 2, then y term will get eliminated
Let us add eqn 1 and eqn 2
x + 6y + 8x - 6y = 16 - 2
6y and -6y will get eliminated
Thus, y-variable will be eliminated when adding the system of equations
x + 8x = 14
9x = 14
x = 1.55
Substitute x = 1.55 in eqn 1
1.55 + 6y = 16
6y = 16 - 1.55
6y = 14.45
y = 2.408
Thus the solution is x = 1.55 and y = 2.408
There is only one solution to the system of equations