Calculating a Data Value from a Percentile
2 answers:
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Answer:
x =
Step-by-step explanation:
the ratio of side to hypotenuse in a right triangle is 1 :
in this problem we can use 'x' in place of 1 and in place of
to create a proportion like this:
1/x = /
cross-multiply to get:
·x =
x =
x =
Answer:
⇒ answer 1
Step-by-step explanation:
* Lets explain how to find the inverse of a function
- To find the inverse of a function :
# Write y = f(x)
# Switch the x and y
# Solve to find the new y
# The new y is
* Lets solve the problem
∵ f(x) = 2x + 1
- Put y = f(x)
∴ y = 2x + 1
- Switch x and y
∴ x = 2y + 1
- Solve to find the new y
∵ x = 2y + 1
- Subtract 1 from both sides
∴ x - 1 = 2y
- Divide both sides by 2
∴ (x - 1)/2 = y
- Divide each term in the left hand side by 2
∴ y = 1/2 x - 1/2
- Replace y by
∴
* The inverse of the function is
4 |x = 5| = 20
First, divide both sides by 4. / Your problem should look like:
Second, simplify
to 5. / Your problem should look like:
Third, break the problem into 2 equations. / x + 5 = 5 and -(x + 5) = 5
Fourth, solve x + 5 = 5. /
Cancel 5 on both sides. /
Fifth, solve -(x + 5) = 5 /
Simplify brackets /
Add 5 to both sides /
Add 5 + 5 /
Multiply both sides by -1 /
x = -10
Sixth, collect the solutions to the problems. / Your problem should look like:
Answer: x = -10, 0
First, divide both sides by 4. / Your problem should look like:
Second, simplify
Third, break the problem into 2 equations. / x + 5 = 5 and -(x + 5) = 5
Fourth, solve x + 5 = 5. /
Cancel 5 on both sides. /
Fifth, solve -(x + 5) = 5 /
Simplify brackets /
Add 5 to both sides /
Add 5 + 5 /
Multiply both sides by -1 /
x = -10
Sixth, collect the solutions to the problems. / Your problem should look like:
Answer: x = -10, 0