The sum of two numbers is nine. If one number is subtracted from the other, the result is -3. Find the numbers
1 answer:
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Answer:
<u>10.1 miles</u> far is their house.
Step-by-step explanation:
Given:
If someone ran 14.6 miles from their house and then they are now 9.8 miles from their house and finally they are 5.3 miles away.
Now, to find the distance is far from their house.
14.6 miles distance they ran from their house.
So, they are far from house =
Then, 9.8 miles they are from their house.
So, they are far from house =
And, finally 5.3 miles away from their house.
So, now they are far from house =
Therefore, 10.1 miles far is their house.
well, we know the piece-wise function is
hmmm so what's f(-1), namely what is f(x) when x = -1?
well, when x = -1, hmm -1 is less than 0, so the subfunction that applies to that will be when "x" is less than 0, namely the part of 7x + 10, so we can say
f(-1) = 7(-1) + 10
f(-1) = 3
so hmm what's f(0) or namely, what's f(x) when x = 0?
well, what subfunction applies when x = 0? well, it has to be the subfunction with "x greater or <u>equals</u> to 0", x ⩾ 0, so then is 7x + 20
f(0) = 7(0) + 20
f(0) = 20.