Answer:
d
Step-by-step explanation:
Answer:
r = 72
Step-by-step explanation:
Given that:
r/4=18
Multiplying both sides by 4
r = 18*4
r = 72
I hope it will help you!
Answer:
112
Step-by-step explanation:
lol not 100% sure
Answer:
k = 2
Step-by-step explanation:
Given
15k - 4 = 5k + 16 ( subtract 5k from both sides )
10k - 4 = 16 ( add 4 to both sides )
10k = 20 ( divide both sides by 10 )
k = 2
Answer:

Step-by-step explanation:
A hyperbola is the locus of a point such that its distance from a point to two points (known as foci) is a positive constant.
The standard equation of a hyperbola centered at the origin with transverse on the x axis is given as:

The coordinates of the foci is at (±c, 0), where c² = a² + b²
Given that a hyperbola centered at the origin with x-intercepts +/- 4 and foci of +/-2√5. Since the x intercept is ±4, this means that at y = 0, x = 4. Substituting in the standard equation:

The foci c is at +/-2√5, using c² = a² + b²:

Substituting the value of a and b to get the equation of the hyperbola:
