3x+1+3x+1+2x+2x or 2(3x+1+2x)
10x+2
Answer:
$19
Step-by-step explanation:
59.50-21.50=38
38/2=19
Sin A=Cos (90º-A)
Then:
sin 30º=cos (90º-30º)=Cos 60º=1/2
Answer: cos 60º=1/2
Answer:
a. x = 9
b. GH = 30; GK = 20
Step-by-step explanation:
An angle bisector in a triangle divides the sides proportionally.
<h3>a.</h3>
In this triangle, that means ...
(3x +3)/18 = (3x -7)/12
2(3x +3) = 3(3x -7) . . . . . . . multiply by 36
6x +6 = 9x -21 . . . . . . . . . eliminate parentheses
27 = 3x . . . . . . . . . . . . . . add 21 -6x
x = 9 . . . . . . . . . . . . . . . divide by 3
__
<h3>b.</h3>
The segment lengths are found by substituting the value of 3x in each of the given expressions:
GH = 3x +3 = 27 +3 = 30
GK = 3x -7 = 27 -7 = 20
In (3) we're supposed to multiply both sides by 7/4 but the 7/4 got flipped over on the right hand side.
In (4) we lost a minus sign going from the second to third step. We would have been better off multiplying both sides by -6.
