Answer:
f⁻¹(7) = 1
Step-by-step explanation:
Step 1: Write out function
f(x) = 3x + 4
Step 2: Find f⁻¹(x) (or known as inverse f(x))
y = 3x + 4
x = 3y + 4
-3y + x = 4
-3y = 4 - x
y = -4/3 + x/3
Step 3: Plug in 7 into inverse f(x)
f⁻¹(7) = 7/3 - 4/3
f⁻¹(7) = 3/3
f⁻¹(7) = 1
Answer:
46°
Step-by-step explanation:
We can tell that this triangle is an isosceles triangle because 2 of it's sides are the same, therefore, two of it's angles are the same.
Looking at it, we can assume that the two angles not defined (x and the other one) are the two angles that are the same because they look similar.
Now, the angles of all triangles add up to 180°. So, we can subtract 88° from 180 to see what the two angles add up to.
So both of these angles add up to 92 degrees. Since there are two, we divide 92 by 2.
Hope this helped!
Answer:
Option d (7.84 or less) is the right alternative.
Step-by-step explanation:
Given:
Random sample,
The level of significance,
= 0.95
or,
hence,
The margin of error will be:
⇒
By putting the values, we get
The answer is A because completing the square gives a minimum of 2,-9 and factorising gives roots of 5 and -1 :)
It is the bottom right one because the amount he walked has to be greater than 200