Answer:
First you choose a wrong section, second, the answer is: helps the body move.
Answer:
16. B
17. B
Step-by-step explanation:
16. The intercept form of the parabola is

where
are two x-intercepts.
In your case,

so

To find <em>a</em>, substitute coordinates of the point (-6,-4) parabola is passing through

and

17. The vertex form of the parabola equation is

where <em>(h,k)</em> are the coordinates of the vertex and sign "-" because parabola goes down.
In your case, vertex is (2,3), so

The vertex is 3 units from the focus, then

The equation of the parabola is

Answer:
Number is 4536
Step-by-step explanation:
Assume;
Same number = a
Multiply of 7 = b
So,
a+a+a+b = 39
3a + b = 39
Use b = 7
3a + b = 39
3a + 7 = 39 (Not possible)
Use b = 14
3a + b = 39
3a + 14 = 39 (Not possible)
Use b = 21
3a + b = 39
3a + 21 = 39
a = 6
So,
Number is 6 x 6 x 6 x 21
Number is 4536
Answer:
k = - 3
Step-by-step explanation:
Given that x = 3 is a solution then it satisfies the equation, that is
2(3)² - 5(3) + k = 0
2(9) - 15 + k = 0
18 - 15 + k = 0
3 + k = 0 ( subtract 3 from both sides )
k = - 3