PLEEASSE HELP:))) (theres a pic)
1 answer:
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4(-2) is modeled on the number line.
Step-by-step explanation:
Step 1:
The multiplication problem's answer is -8, so first, we need to determine which options actually equal the answer.
We individually determine how much each of the options equal.
Step 2:
, option 1 equals -8, so it could be the answer.
option 2 does not equal -8, so it cannot be the answer.
option 3 also does not equal -8, so it cannot be the answer.
option 4 does, so it could be the answer.
Step 3:
In the number line, 4 arrows are equalling -2 every time. So the answer is option 4. .
Answer:
Step-by-step explanation:
First, let's change those variables to x and y, just for the sake of convenience. In order to find the inverse of a function algebraically, switch the x and y coordinates, then solve for the new y. Letting y = A(n) and x = n (we will switch them back when we're done):
y = 3x - 20. This is linear; a line with a slope of 3 and a y-intercept of -20. When we switch the x and the y, we get:
x = 3y - 20. Now we solve for the new y. Begin by adding 20 to both sides:
x + 20 = 3y. Now divide both sides by 3:
, or to write it in slope-intercept form, like the function you started with:
This is also a line, with a slope of 1/3 and a y-intercept of +20/3
Now, replacing:
That is how to write the inverse using function notation. The little -1 as an exponent tells us that this is the inverse of the function A(n).