Answer: Yes. The answer is D.
D
I think.. I'm not 100% sure, but I would put D
Let <em>a</em> be the number in the 10s place and <em>b</em> in the 1s place. Then the original two-digit number is 10<em>a</em> + <em>b</em>.
The sum of the digits is 5:
<em>a</em> + <em>b</em> = 5
Subtract 9 from the original number, and we get the same number with its digits reversed:
(10<em>a</em> + <em>b</em>) - 9 = 10<em>b</em> + <em>a</em>
Simplifying this equation gives
9<em>a</em> - 9<em>b</em> = 9
or
<em>a</em> - <em>b</em> = 1
Add this to the first equation above:
(<em>a</em> + <em>b</em>) + (<em>a</em> - <em>b</em>) = 5 + 1
2<em>a</em> = 6
<em>a</em> = 3
Then
3 - <em>b</em> = 1
<em>b</em> = 2
So the original number is 32. Just to check, we have 3 + 2 = 5, and 32 - 9 = 23.
Answer:
The correct option is C) x + y + z = 180 degrees
Step-by-step explanation:
Consider the provided information.
It is given that four r, x , y and z.
If x , y and z are the interior angle then,
According to the Angle sum property of triangle: The sum of three interior angles of triangle is 180°.
Therefore, the sum of x , y and z must be equal to 180 degrees.
Hence, the correct option is C) x + y + z = 180 degrees
