Which equation is equivalent to 2/3(3x+9)=21
2 answers:
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The equation of a parabola is:
If a>0, then the parabola opens up;
If a<0, then the parabola opens down.
The coordinates of focus are:
If a>0, then the parabola opens up;
If a<0, then the parabola opens down.
The coordinates of focus are:
Answer:
Price of each phone:
Price of each accessory:
Step-by-step explanation:
Let be "p" the price in dollars of each phone and "a" the price in dollars of each accessory.
Set up a system of equations:
You can use the Elimination Method to solve the system.
Multiply the second equation by -2 and add both equations:
Substitute the value of "a" into the first equation and solve for "p":