17% would be equal to 17/100. 4/25 is equivalent to 16/100. Therefore, 17% is larger.
Answer:
6 goes on top of 3
4.5 goes under 9
Step-by-step explanation:
its self-explanatory
A) The first step needs 100 bricks, the second needs 98, the third needs 96, and so on. Therefore the number of bricks for the nth step is: a_n = a_1 + d(n-1), where a_1 = 100 (the first term), d = -2 (difference).
a_n = 100 - 2(n-1) = 102 - 2n, and for the 30th step, a_30 = 102 - 2*30 = 42. So the top step will need 42 bricks.
b) The total staircase will need: 100 + 98 + 96 + ... + 44 + 42, and there are n = 30 terms. Using the formula for the sum of an arithmetic sequence:
S = (a_1 + a_n)*n/2 = (100 + 42)*30/2 = 2130
Therefore, 2130 bricks are required to build the entire staircase.
Answer: 91
Step-by-step explanation:
95 - 4 (That he gave to Harry) = 91
Hope this helped!
x adds 1 and y subtracts by 6
