Answer:
l=13in
Step-by-step explanation:
hope this helps
Answer:
8b + 7
Step-by-step explanation:
Add like terms.
7b + b (same as 1b) = 8b
4 + 3 = 7
Answer:
x = 40
Step-by-step explanation:
2x = 4x - 40 (recall properties of a parallelogram)
Solve for x
2x - 4x = 4x - 40 - 4x (subtraction property of equality)
-2x = -40
-2x/-2 = -40/-2 (division property of equality)
x = 20
Correct Answer:Option A. 17.1 Yards
Solution:Let the height of trapezium is x yards. According to the given data, we can express the lengths of bases in terms of height.
The short base is 3 yards greater than the height, so measure of short base will be (x+3) yards.
The longer base is 5 yards greater than the height, so measure of longer base will be (x+5) yards.
Area of trapezium is given to be 360 square yards.
Area of trapezium = 0.5 x (Height) x (Sum of Bases)
Using the values, we get:
![360=0.5(x)(x+3+x+5) \\ \\ 720=x(2x+8) \\ \\ 2 x^{2} +8x-720=0 \\ \\ 2( x^{2} +4x-360)=0 \\ \\ x^{2} +4x-360=0 \\ \\ x= \frac{-4+- \sqrt{16-4(1)(-360)} }{2} \\ \\ x= \frac{-4+- \sqrt{1456} }{2} \\ \\ x = 17.1 , -21.1](https://tex.z-dn.net/?f=360%3D0.5%28x%29%28x%2B3%2Bx%2B5%29%20%5C%5C%20%20%5C%5C%20%0A720%3Dx%282x%2B8%29%20%5C%5C%20%20%5C%5C%20%0A2%20x%5E%7B2%7D%20%2B8x-720%3D0%20%5C%5C%20%20%5C%5C%20%0A2%28%20x%5E%7B2%7D%20%2B4x-360%29%3D0%20%5C%5C%20%20%5C%5C%20%0A%20x%5E%7B2%7D%20%2B4x-360%3D0%20%5C%5C%20%20%5C%5C%20%0Ax%3D%20%5Cfrac%7B-4%2B-%20%5Csqrt%7B16-4%281%29%28-360%29%7D%20%7D%7B2%7D%20%5C%5C%20%20%5C%5C%20%0Ax%3D%20%20%5Cfrac%7B-4%2B-%20%5Csqrt%7B1456%7D%20%7D%7B2%7D%20%5C%5C%20%20%5C%5C%20%0Ax%20%3D%2017.1%20%2C%20-21.1)
Since the height cannot have a negative value, we conclude that the height of trapezium rounded to nearest tenth of a yard will be 17.1 yards.
Answer:
![[2 - \sqrt{6}, 2\sqrt{6}] \\ [2 + \sqrt{6}, -2\sqrt{6}]](https://tex.z-dn.net/?f=%5B2%20-%20%5Csqrt%7B6%7D%2C%202%5Csqrt%7B6%7D%5D%20%5C%5C%20%5B2%20%2B%20%5Csqrt%7B6%7D%2C%20-2%5Csqrt%7B6%7D%5D)
The work is shown above.
I am joyous to assist you anytime.