Answer:
Hans has done a mistake in the second step.
The correct answer is:
5x^2+13x-6=0
5x^2+15x-2x-6x=0 - 5. -6=-30 -30=15. -2
5x(1+3x)-2x(1+3x)=0
(5x-2x)(1+3x)=0
5-2x=0 1+3x=0
x=5/2 x=-1/3
9514 1404 393
Answer:
no; 1+1=2, a number not in the set
Step-by-step explanation:
A set is closed under addition if the addition of any two members of the set results in a member of the set.
0 + 0 = 0 . . . in the set
0 + 1 = 1 . . . in the set
1 + 0 = 1 . . . in the set
1 + 1 = 2 . . . not in the set. The set is not closed under addition.
We can use the tangent ratio, where tan(x)=opposite/adjacent. In this question, FT is the 'opposite', TV is the 'adjacent' and 43° is 'x'.
Let's substitute the values into the equation, and rearrange to find the length of FT:
tan(43)=FT/53
× both sides by 53
53tan(43)=FT
Using a calculator, the answer to this equation gives us 49.42329957. Thus, the answer is D. 49.42
Answer:
A = 48x + 24 (square units)
Step-by-step explanation:
L = 6x + 3
W = 8
A = L * W
A = 8(6x + 3)
A = 48x + 24