Answer: The answer is 
Step-by-step explanation: We are to find the equation of the parabola with x-intercepts (-2,0), (1.2,0) and y-intercept (0,-4).
Therefore, axis of symmetry is
Let the equation of the parabola be 
Substituting the points (x,y)=(0,-4) and (1.2,0) in the above equation, we find that
and
Solving the above two equations, we get
So, putting the values of 'a' and 'k' in the equation of the parabola, we get
Thus, the equation of the parabola is
X+y=17 solve for a variable and plug into the 2nd equation
(x+3)/y=1 also could be written as x+3=y
x=17-y
17-y+3=y combine and add y over to other side
20=2y
y=10
plug back in x+10=17
x=7
so the original fraction is 7/10
Answer:
-4
Step-by-step explanation:
-129 = 6(7 + 7x) - 3
Distribute the 6 into the parentheses.
-129 = 42 + 42x - 3
Add like terms.
-129 = 39 +42x
Subtract 39 from both sides.
-168 = 42x
Divide 42 from both sides.
-4 = x
Isosceles triangle =2 sides the same
180-100= 80
80÷2=40
40+40+100=180
Answer =40
