Answer:
x=3
Step-by-step explanation:
to find the axis of symmetry of a parabola when the equation is of the form
y = ax^2 +bx+c, we can use
h = -b/2a where h is the line of symmetry
a =1 b = -6 and c =-7
h = -(-6)/ 2*1
h = 6/2 =3
The axis of symmetry is in the x direction
x=3
The correct answer is Option 4.
9514 1404 393
Answer:
The equation should be 8 (x minus 2.75) = 78, and she needs to sell each necklace for $12.50.
Step-by-step explanation:
The contribution margin of each necklace is the difference between its selling price (x) and its cost (2.75). Then the total profit from 8 necklaces would be ...
8(x -2.75)
If Rita wants that profit to be $78, then she needs to solve the equation ...
8(x -2.75) = 78 . . . . correct equation
The solution is ...
x -2.75 = 9.75 . . . . divide by 8
x = 12.50 . . . . . . . . add 2.75
She needs to sell each necklace for $12.50.
Ok so basically you have to find an fractions that simplifies to 1/4. So 2/8 is a good example of a equivalent fraction
