Answer:
yes, yes it is ....
Step-by-step explanation:
The length of side EF is the average of the lengths of the bases AB and CD of trapezoid ABCD.
EF = (8 + 20)/2 = 14
Trapezoid EF has bases 14 and 20.
The height of trapezoid EFCD is half the height of trapezoid ABCD, or 6.
A = (B + b)h/2 = (20 + 14) * 6 / 2 = 102
Answer: The area of trapezoid EFCD is 102 square units
1)
x^2 + 4 = 0 Subtract 4 from each side
x^2 = -4
You cannot square a number to get a negative number. No real solution. (If you have learned about imaginary numbers, answer is 2i)
2)
<span>x^2+x-6=0 Factor. 3 and -2 add up to 1, and multiply to -6
(x+3)(x-2) = 0
Zero Product Property: Which numbers would put a zero in one of the parentheses?
x = -3 or x=2
3) </span><span>x^2-6x+7=0
Completing the Square:
Take half of b (-6), square it, and add/subtract that coefficient
x^2 - 6x + 9 - 9 + 7 = 0
(x -3)^2 - 2 = 0 Add 2 to both sides
(x-3)^2</span> = 2 Take the square root of both sides
<span>(x-3) = </span>√2 or -√2 Add 3 to both sides
<span>x = 3 + </span>√2 or 3 - √2<span>
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Question 9 is 1 4/10 or 1 2/5. Question 8 is greater than. Question 7 is greater than. Question 5 is less than