Answer:
1/9
Step-by-step explanation:
after simplifying you will get 3^b-a. if a-b =2, b-a=-2. 3^-2=1/9
Answer:
the duration of this event is 4 hours
Step-by-step explanation:
This function is a quadratic one
let Δ be the dicriminant :
- a = -16
- b = 48
- c= 64
- Δ = 48²-4*(-16)*64 = 6400
so there are two values that satisfy -16t²+48t+64 = 0 x and y
- x= (-48+80)/-16*2 = -1
- y= (-48-80)/-16*2= 4
x<0 so w won't take it since time is a positive value here
so t = y = 4h
Answer:
13in
Step-by-step explanation:
To find the diagonal we use the Pythagorean Theorem:
52+122=x2 where x = hypotenuse
25+144=x2 or x=13in
D=rt
c=speed of current
r=speed in still water
t=time
d=72
72=3(r+c)
72=4(r-c)
expand
divide top equation by 3 and bottom by 4
24=r+c
18=r-c
add them equations
42=2r+0c
42=2r
divide both sides by 2
21=r
sub back
18=r-c
18=21-c
minus 21 both sides
-3=-c
3=c
speed of current is 3
speed of ship is 21
This is a proportion problem._____ is to ______ as ______ is to ________. This is a mathematical version of an analogy.
4 is to 9 as what is to 1200
