Answer:
3.60
Step-by-step explanation:
lol i just did it
Answer:
y = 20 - x
Step-by-step explanation:
Perimeter of a rectangle = 40 units
2 * ( length + width) = 40
2* (x + y) = 40 {Divide both sides by 2}}
x + y = 40/2
x + y = 20 {Subtract x from both sides}
y = 20 - x
Assuming by "20111" you mean 2011.
The difference in years is 2011 and 1990 is 21 years.
In 21 years the rate of change was "-$1850" (44,450 - 6,300).
Furthermore, this can be divided by 21 to get the AVERAGE rate of change in 1 year
21 years / -1850 = -$88.096 (3 DP)
Answer:
37 degrees
Step-by-step explanation:
The first thing you have to do is realize all angles in a triangle have to add up to 180 degrees.
So you would make you equation
![2x + 15 + 5x - 2 + 90 = 180](https://tex.z-dn.net/?f=2x%20%20%2B%2015%20%2B%205x%20-%202%20%2B%2090%20%3D%20180)
Then you put all your constants on one side and the X's on the other. So you get
![7x = 77](https://tex.z-dn.net/?f=7x%20%3D%2077)
Then your x =11
To find that angle
![2x + 15](https://tex.z-dn.net/?f=2x%20%2B%2015)
You just plug in 11
![2(11) + 15](https://tex.z-dn.net/?f=2%2811%29%20%2B%2015)
=37
Answer:
See below.
Step-by-step explanation:
x^2 + 2x = 19
(x + 1)^2 - 1 = 19
(x + 1)^2 = 20.