Answer:
One hour and 16 minutes
Step-by-step explanation:
12 walls (divided by 12) 1 wall
---- → -----
14 hours (So here we should do the same) 1.16
There are like terms in this problem. It looks scary but if we combine our like terms it makes it a lot easier. Also, like terms are terms with the same variables that are at the same power.
So add 7a^2 and -3a^2
You'll get the following sum:
4a^2
Add -17a and 2a
You'll get the following sum:
-15a
So our new problem looks like this:
4a^2 - 15a = 0
Factor out the variable "a." Leaving you with this:
We can rewrite the problem like this:
4a^2 - 15a + 0 = 0
Now we can use the quadratic equation!
Where +/- is simply the add or divide symbol. Now let's plug in our numbers!
Simplifying a bit you get the following function:
sqrt(225) = 15
15 + 15 = 30
30 / 8 = 15/4
15 - 15 = 0
0 / 8 = 0
Your two answers are:
15/4 and 0
Step-by-step explanation:
Area of Sector
= θ/360° * πr² (degrees) or 0.5r²θ (radians)
Question 11:
- (88°)/360° * π(19)² = 277.23ft².
Question 12:
- (260°)/360° * π(11)² = 274.54mi².
Question 13:
- 0.5(6.2)²(7π/12) = 35.22km².
Question 14:
- 0.5(7.1)²(5π/3) = 131.97cm².
Question 15:
- (215°)/360° * π(4.5)² = 37.99yd².
Question 16:
- 0.5(21.4)²(13π/18) = 519.54m².