'18' is the only 2-digit number that is lesser than 50 and the sum of its digits remain unaffected despite being multiplied by a number < 1.
To prove,
Let's see some situations:
If we add up the two digits of 18. We get,
1 + 8 = 9
And we multiply it by 2 which is greater than 1. We get,
18 * 2 = 36
The sum remains the same i.e. 3 + 6 = 9
Similarly,
If 18 is multiplied to 3(greater than 1), the sum of the two digits comprising the number still remains the same;
- 18 * 3 = 54
where (5 + 4 = 9)
Once more,
Even if 18 is multiplied to 4 or 5(greater than 1), the sum of its digits will still be 9.
- 18 * 4 = 72
(7 + 2 = 9)
- 18 * 5 = 90
(9 + 0 = 9)
Thus, 18 is the answer.
Learn more about 'numbers' here: brainly.com/question/1624562
Answer:
$.08
Step-by-step explanation:
it takes 0.4 per hour and it costs $0.20 per hour so you multiply the two numbers together.
0.4 x 0.20 = $.08
Answer:
B. Alan's lifetime income includes his salary and retirement benefits.
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Answer:
the last one
Step-by-step explanation:
The zeros of m(x) =x^2-4x+3 are 1 and 3