Answer:
320,400
Step-by-step explanation:
80,100 restricted numbers x 4 area codes
Answer:
Required slope = - 6
Step-by-step explanation:
Parallel lines have same slope.
(x₁ , y₁) = (3 , -5) & (x₂ , y₂) = (1, 7)
![= \frac{7 - [-5]}{1-3}\\\\=\frac{7+5}{1-3}\\\\=\frac{12}{-2}\\\\= -6](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B7%20-%20%5B-5%5D%7D%7B1-3%7D%5C%5C%5C%5C%3D%5Cfrac%7B7%2B5%7D%7B1-3%7D%5C%5C%5C%5C%3D%5Cfrac%7B12%7D%7B-2%7D%5C%5C%5C%5C%3D%20-6)
Slope of the a line parallel to a line = -6
Step-by-step explanation:
let eqn be y = mx + b.
3y = x - 15
y = 1/3x - 5
perpendicular means product of grad = -1
hence m = -3.
sun (8, 0):
8 = -3(0) + b
b = 8
therefore, equation if the line is y = -3x + 8
Topic: coordinate geometry
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A.
For this case, let us set the variables:
s = 0 (final destination on the ground)
t = unknown
vo = 0
so = 8000 ft
Using the equation, we calculate for t:
0 = -16 t^2 + 0t + 8000
t = 22.36 s
B.
For this case:
s = unknown
t = 22.36 s
vo = 600 miles/hr = 880 ft/s
so = 0
Using the equation, we calculate for s:
s = -16*(22.36)^2 + 880*22.36 + 0
s = 11, 677.29 ft = 2.21 miles
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