Let x be the digit in the tens place and y be the digit in the ones place.
so, the digit is xy
<span>
The ten's digit of a two digit number is 1 more than 4 times the units' digit.
</span>x = 4y + 1
<span>63 is subtracted from the number, the order of the digits is reversed
</span>10x + y - 63 = 10y + x
9x - 9y = 63
x = 4y + 1 ------------ (1)
9x - 9y = 63 ---------- (2)
Sub (1) into (2)
9(4y + 1) - 9y = 63
36y + 9 - 9y = 63
27y = 63 - 9
27y = 54
y = 2 ------- sub into (1)
x = 4(2) + 1 = 9
x = 9, y = 2
The number is 92
She practices 5 hours a day.
120/4 = 30 hours per week.
30/6 = 5 hours per day.
She gave her sister 1/4 of her set.
3/12=1/4
Hope this helps!!
The value of tan a is 2.9098
Explanation:
The given value is 
Now, we shall find the value of sin (a), using the identity,
Substituting the value of cos (a), we get,
Subtracting both sides by 0.1056, we have,
Taking square root on both sides, we get,
Now, we shall substitute the value of sin (a) and cos (a) to determine the value of tan (a) in the identity 
Thus, the value of tan (a) is 2.9098
C. Ask every 12th person who leaves school one afternoon. Roll dice to determine which person to ask first.
