20% have an A because 1/5 of 100 is 20
Answer:
nx^(n-1).
Step-by-step explanation:
d/dx (x^n)
We multiply by n than subtract 1 from the exponent (n):
= n x^(n-1)
Numerical examples:
d(x^3) dx = 3 * x^(3-1)
= 3x^2.
d(2x^5)/dx = 5*2 x^(5-1)
= 10x^4.
We have two overlapped triangles:
x/24=6/x
cross multiply
x²= 144
x=√144= 12 so x = 12
Answer:
Option 2 is the correct answer.
Step-by-step explanation:
We know that

We have 1 mile = 5280 feet thus 6 miles = 31680 feet
Similarly 1 hour = 3600 seconds
Applying values in the equation above we get

Thus his average speed is less than 18feet/sec
Answer:
15 units
Step-by-step explanation:
ΔABC is right with ∠C = 90° and AB the hypotenuse
using Pythagoras' identity on the triangle
AB² = AC² + BC² , hence
BC² = AB² - AC² = 17² - 8² = 289 - 64 = 225
⇒BC =
= 15 units