x + 5 and 4x^2
Multiply the exponent of x by 2giving
The answer is
x^2 evaluates to
Multiply a and 5
Multiply a and 1
The a just gets copied along.
The answer is a
a
5*a evaluates to 5a
Answer:
radius = 5 units
area of a circle = 15.7units²
Step-by-step explanation:
given that the circumference of a circle = 31.4
radius = ?
recall that the formulae for finding the circumference of a circle = 2πr
circumference of a circle = 2 x 3.14 x r
31. 4 = 6.28r
divide both sides by the coefficient of r which is 6.28
31.4/6.28 = 6.28r/6.28
5 = r
radius = 5 units
therefore the radius of the circle whose circumference is 31.4 units is evaluated to be 5units
to find the area of the circle
recall the formula = πr²
area of a circle = 3.14 x 5²
area of a circle = 3.14 x 25
area of a circle = 15.7units²
Average rate of change = slope
Use slope formula. (Rise over Run)
![m = \frac{y_2 - y_1}{x_2 - x_1}](https://tex.z-dn.net/?f=m%20%3D%20%5Cfrac%7By_2%20-%20y_1%7D%7Bx_2%20-%20x_1%7D)
look at the 2 points where x=0 and x = 2, this interval covers the first 2 seconds.
f(0) = 50, f(2) = 100
![m = \frac{100 -50}{2-0} = \frac{50}{2} = 25](https://tex.z-dn.net/?f=m%20%3D%20%5Cfrac%7B100%20-50%7D%7B2-0%7D%20%3D%20%5Cfrac%7B50%7D%7B2%7D%20%3D%2025)
The avg rate of change is 25 units per second.
Its the identity property