Answer:
The answer to your question is Area = 62.5 u²
Step-by-step explanation:
Area = 
a and b are bases
c = heigth
dAD = 
dAD = 
dAD = 
dAD = 
dAD = 
dAD = 20 u
dBC = 
dBC = 
dBC = 
dBC = 5 u
dAB = 
dAB = 
dAB = 
dAB = 
dAB = 5u
Area = 
Area = 
Area = 5(12.5)
Area = 62.5 u²
The value of n in the equation is 1
Step-by-step explanation:
The equation is
(2n + 4) + 6 = -9 + 4(2n + 1)
At first we must do that:
1. Open the brackets in both sides
2. Add like terms
3. Solve to find n
L.H.S:
∵
(2n + 4) + 6 = -n - 2 + 6
∴
(2n + 4) + 6 = -n + 4
R.H.S:
∵ -9 + 4(2n + 1) = -9 + 8n + 4
∴ -9 + 4(2n + 1) = 8n - 5
∴ -n + 4 = 8n - 5
- Add 5 to both sides
∴ -n + 9 = 8n
- Add n to both sides
∴ 9 = 9n
- Divide both sides by 9
∴ n = 1
The value of n in the equation is 1
Learn more:
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The answer is C, 10 7/15 !
Answer:
775
Step-by-step explanation:
We are given two equations in which we can perform systems of equations by putting these two equations on top of each other then solving for one variable:
x+y=15
x-y=25
Here, we can cancel out the y variable and get:
2x=40
x=20
Then we can put the x variable into any of the equations to solve for y (in this case I will use the equation x+y=15 so 20+y=15
y=-5
Now, we can solve by plugging both variables into 2x^2 - y^2 :
2(20)^2 - (-5)^2
800-25 = 775
I hope this helps!