9/20 because you would get it as a decimal first and it would be .45 then put 100 at the end and then reduce and you end up with 9/20
You would need to write at least 11 checks for the second one to be a better option.
Since the first has a lower base cost, we know it is cheaper to start. So, we have to find out when they become even. To do so, we need an equation for both banks. We can model the first one using 5 + .25x (where x is the number of checks) and the second as 6 + .15x. Now we can set them equal to find when they are even.
5 + .25x = 6 + .15x -----> subtract 5 from both sides
.25x = 1 + .15x -----> subtract .15x from both sides
.10x = 1 -----> multiply both sides by 10
x = 10
Since they are even at 10 and better for bank 1 before that, they are all better for bank 2 afterwards.
Answer:
7
Step-by-step explanation:
98
A 3:2 ratio. 5 x 3 for 15, and 5 x 2 for 10
Answer:
1) When r = 2, M = 20.
2) When M = 540, r = 6.
Step-by-step explanation:
M is a directly proportional to r cubed
This means that the equation for M has the following format:
In which a is a multiplier.
When r=4 M=160.
We use this to find a. So
So
1) work out the value of M when r=2
When r = 2, M = 20.
2) work out the value of r when M=540
When M = 540, r = 6.