Negative exponents work like this:
So, in order to evaluate a negative exponent, you simply have to invert the base, and then raise to the positive equivalent of the exponent.
As an example, here are the first three exercises:
You can work out the rest applying this logic.
Answer: 63.59cm²
Step-by-step explanation:
The area covered by the pitch will be gotten by finding the value of the area of the circle and this will be:
Area of q circle = πr²
where,
π = 3.14
r = radius = diameter/2 = 9cm/2 = 4.5cm
Area = πr² = 3.14 × 4.5²
= 3.14 × 20.25
= 63.59cm²
Therefore, the area covered by the pitch is 63.59cm²
Answer:
The solution set would be (2, -1)
Step-by-step explanation:
To find the solution set, use the elimination method. You can do this my multiplying the whole first equation by 2 and then adding the two equations together.
6x + 4y = 8
2x - 4y = 8
----------------
8x = 16
x = 2
Now that we have the value of x, solve for y using either equation.
2x - 4y = 8
2(2) - 4y = 8
4 - 4y = 8
-4y = 4
y = -1
