Oops wrong question I answered, Sorry.
1 day = d
0 + 3d = 4 + 2d
3d = 4 + 2d
d = 4
It'll take 4 days
Hope this helps ^-^
OK. Here we go:
What is the square root of 9 ?
You would say that 3 is, and you're correct.
But that's NOT the <em>only one</em> there is !
What about -3 ?
What do you get when you multiply (-3) times (-3) ?
(Remember that when the signs of both numbers are <em>the same</em>,
the answer is positive.)
(-3) times (-3) = 9
So -3 is <em>also</em> the square root of 9 .
That's right . . . every number has <em>two</em> square roots. They're both the
same number, but one is positive, and one is negative. When you
multiply <em>either one</em> of them by itself, you get the original number.
Another way to say the same thing is:
Every number has one positive square root and one negative square root,
and except for the signs, they're both the same number.
The slope of every horizontal line is 0 because that is based on the formula. If it's horizontal on the x axis for example, the point slope will be 0,0, also the horizontal line is the numerator, i think. And the undefined slope is vertical because it's the denominator.
Answer:
1. Proved down
2. proved down
3. f(10) = -20 - 5 - 5 - 5 - 5 - 5 - 5 - 5 - 5 - 5 - 5
Step-by-step explanation:
Let us explain how to solve the question
∵ f(0) = -20, f(n) = f(n - 1) - 5 for n > 1
→ That means we have an arithmetic sequence with constant
difference -5 and first term -20
1. → f(1) means we need to find the second term, which equal the
term - 5
∵ f(1) means n = 1
∴ f(1) = f(1 - 1) - 5
∴ f(1) = f(0) - 5
∵ f(0) = -20
∴ f(1) = -20 - 5 → Proved
2. → f(3) means we need to find the third term, which equal the
second term - 5
∵ f(3) means n = 3
∴ f(3) = f(3 - 1) - 5
∴ f(3) = f(2) - 5
→ f(2) = f(1) - 5
∵ f(1) = -20 - 5
∴ f(2) = [-20 - 5] - 5 = -20 - 5 - 5
∴ f(3) = [-20 - 5 - 5] - 5
∴ f(3) = -20 - 5 - 5 - 5 → Proved
3. → From 1 and 2 we notice that the number of -5 is equal to n,
at n = 1 there is one (-5), when n= 3 there are three (-5)
∵ n = 10
∴ There are ten (-5)
∴ f(10) = -20 - 5(10)
∴ f(10) = -20 - 5 - 5 - 5 - 5 - 5 - 5 - 5 - 5 - 5 - 5 → Proved
