Answer:
a = 17
Step-by-step explanation:
In the picture.
I hope that it's a clear solution.
Scientific notation is a system for expressing very large or very small numbers in a compact manner. It uses the idea that such numbers can be rewritten as a simple number multiplied by 10 raised to a certain exponent, or power.
C
7x18 divided by 2 equals 63
18x22=396
63+396=459
Percent means per one hundred so we can say:
n(20/100)=100
n(1/5)=100
n=500
So 20% of 500 is 100.
check...
500(20/100)
500(1/5)
500/5
100
Answer:
Step-by-step explanation:
The standard form of an equation of a circle:
(h, k) - center
r - radius
We have the center (-5, 0) and the radius r = 8. Substitute: