Set up two equations:
Greg = 330 + 75X
Heather = 660 + 45x
Set them to equal and solve for x:
330 + 75x = 660 + 45x
Subtract 330 from both sides:
75x = 330 + 45x
Subtract 45x from both sides:
30x = 330
Divide both sides by 30:
x = 330 / 30
X = 11
11 months they will have the same amount saved.
Answer:
D.
Step-by-step explanation:
(1/6)*60 = 10
(1/6)*450 = 75
Check your work
75/10 = 7.5
450/60 = 7.5
Correct!
Answer:
I believe it would be - (n+4) x 2
Step-by-step explanation:
Answer:
1
Step-by-step explanation:
Anything to the power of 0 equals 1
Answer:
The 6 Lego kits can be selected from the 9 available Lego kits in 84 ways.
Step-by-step explanation:
Use combinations to solve this problem.
Combination is defined as the selection of <em>r</em> elements from <em>n</em> distinct objects irrespective of the order. The objects cannot be replaced.
There are 9 Lego kits available.
And the total number of children is 6.
That is, we need to select 6 Lego kits from the 9 available Lego kits.
6 Lego kits can be selected from the 9 available Lego kits in
ways.
Solving the combination as follows:
![{9\choose 6}=\frac{9!}{6!\times(9-6)!} \\=\frac{362880}{720\times6}\\ =84](https://tex.z-dn.net/?f=%7B9%5Cchoose%206%7D%3D%5Cfrac%7B9%21%7D%7B6%21%5Ctimes%289-6%29%21%7D%20%5C%5C%3D%5Cfrac%7B362880%7D%7B720%5Ctimes6%7D%5C%5C%20%3D84)
Thus, there are 84 ways to select 6 Lego kits from 9 available Lego kits.