The answer is c.
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I think its b because a coefficient is a number that is placed in front of a variable and the 4 is just a constant
Answer:
$43.30
Step-by-step explanation:
What we know,
3 hamburgers = $12.99
Coleman wants to know how much would he have to pay for 10 hamburgers,
In order to find out how much 10 hamburgers cost, you need to find out how much 1 hamburger costs,
To find how much 1 hamburger costs divide 12.99 by 3,
12.99/3
= 4.33
Now we know that 1 hamburger cost $4.33,
Now time to find out how much 10 hamburgers cost,
Multiply 4.33 by 10,
4.33 × 10
= 43.30
Therefore it cost $43.30 for 10 hamburgers.
the equation of a vertically opening parabola is
(x - h)² = 4p(y - k)
where (h, k) are the coordinates of the vertex and p is the distance of the focus and directrix from the vertex. If 4p is positive parabola opens up and if 4p is negative parabola opens down
rearrange 12y = (x - 1)² - 48 into this form
(x - 1)² = 12y + 48
(x - 1)² = 12( y + 4) ← in standard form
Vertex = (1, - 4 )
4p = 12 ⇒ p = 3 ⇒ parabola opens upwards
the focus is above the vertex and the directrix is below the vertex in a vertically opening up parabola
Focus = (1, - 4 + 3 ) = (1, - 1)
Directrix has equation y = - 4 - 3 ⇒ y = - 7
