Answer:
The cost over time is a proportional relationship
Step-by-step explanation:
Proportional relationships are relationships between two variables where their ratios are equivalent. Another way to think about them is that, in a proportional relationship, one variable is always a constant value times the other. That constant is know as the "constant of proportionality"
B, because to substitute for a variable you have to have an equation to substitute first.
Step-by-step explanation:
We can see that this adds by 20, then 100, and so on. Furthermore, it starts at 9, so we can write this as
∑9+20n
The 9 is because we start with 9, and we have a multiplier of 20, so we put the 20 in there as so. On the bottom of the sum notation, we should have n=1 (as when we plug that in, it's our first number) and at the top you can put a variable k as we don't know the maximum. I don't think I can put numbers at the bottom and top of the sum using the tools I have, so that's why I wrote it out
Answer:
a subject and a predicate
Step-by-step explanation:
Answer:
24
Step-by-step explanation:
