You can write 1000000 is 10 times as many then 100000
Answer:
Step-by-step explanation:
Kira has 3/8 of the total of Jelly Beans available. Morgan has the other 5/8
So if there are 56 Jelly beans in total 3/8 * 56 = 21 which would be Kira's share.
Morgan would have 5/8 * 58 = 35 Jelly beans (Not that this is really relevant).
Now Kira and Mann have a ratio of 6:1 which means that she has 6/7 of the total between those two. He therefore must have 1/7 of the total.
Her total is 21.
1/7 of 21 = 3
Therefore Mann would have 3 jelly beans.
3/8 * 1/7 is the total the number of Jelly Beans that he would have if the total was N
N(3/8 * 1/7) = N (3/56)
Answer:
12x=10(25+x)
Step-by-step explanation:
Jim's rate=x
Pete's rate=y
Jim and Pete lays the same number of tiles.
So we have,
12x=10y
Pete's can lay 25 more tiles than Jim per hour
We have
y=25+x
Substitute y=25+x into 12x=10y
12x=10y
12x=10(25+x)
12x=250+10x
12x-10x=250
2x=250
x=250/2
=125
x=125
12x=10(25+x) is the equation used to find the rate that Jim can lay tiles
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.
I think the answer is 5700
