Answer:
Step-by-step explanation:
The directrix is a vertical line, so the parabola is horizontal. The focus lies to the left of the directrix, so the parabola opens to the left.
For a left-opening parabola:
x = a(y-k)²+h,
a < 0,
vertex (h,k)
focal length p = 1/|4a|
focus (h-p, k)
directrix: x=h+p
Apply your data
focus (1,-4)
directrix x=2
vertex (1.5,-4).
focal length p = 0.5
a = -1/|4p| = -½
x = -½(y-2)²+ ½
![\frac{g}{56}= \frac{2}{8}](https://tex.z-dn.net/?f=%20%5Cfrac%7Bg%7D%7B56%7D%3D%20%20%5Cfrac%7B2%7D%7B8%7D%20%20)
. By cross multiplying 8g = (2)(56) = 112. Divide by 8 on both sides. g = 14. The answer is a.
Answer:
0.78
Step-by-step explanation:
Answer:
If I'm thinking correctly the total amount if workers is 5,400
Step-by-step explanation:
1620÷3=540 (you do this to find the unit rate) 540×10=5,400 (You do this to find the whole 100% of the company.
Answer:
![2(b - 9) \geqslant 26](https://tex.z-dn.net/?f=2%28b%20-%209%29%20%5Cgeqslant%2026)
Step-by-step explanation:
difference of a number and 9 means to subtract
![b - 9](https://tex.z-dn.net/?f=b%20-%209)
twice that means multiply by 2
![2(b - 9)](https://tex.z-dn.net/?f=2%28b%20-%209%29)
at least is greater than or equal to
![2(b - 9) \geqslant 26](https://tex.z-dn.net/?f=2%28b%20-%209%29%20%5Cgeqslant%2026)