Answer:
Step-by-step explanation:
A) Divide both sides of equation by t to isolate r. Then, r = d/t
B) Plugging in the given numbers, solve:
d = distance which is 760,320 yards
r = rate which is unknown
t = time which is 2 hours.
- r = d/t
- r = 760,320 yards / 2 hours
- r = 380,160 yards per hour
C) The conversion from yards to miles, 1 yard = 1760 miles. So, multiply by the previous answer in (B) by the two ratios or just divide:
- 380,160 yards / 1760 miles = 216 miles per hour
D) Use miles in this scenario because of the number of significant digits (yards would require a number in the hundred-thousands).
Answer:
x^4 - 3x^2 - 4
x^4 - (4-1)x^2 - 4
x^4 - 4x^2 + x^2 - 4
x^2( x^2 - 4 ) + 1 ( x^2 - 4 )
( x^2 - 4 ) (x^2 + 1 )
Answer:
x=2
SK=21
KY=13
SY=34
Step-by-step explanation:
finding x:
SK+KY=SY
13x-5+2x+9=36-x
get x by itself
13x+2x+1x=36+5-9
simplify
16x=32
divide by 16 on both sides
x=2
Now plug in x (2) into the separate formulas
SK:
13(2)-5
26-5
21
KY:
2(2)+9
4+9
13
SY:
36-(2)
34
To double check your answer plug in what you got
SK+KY=SY
21+13=SY
34
and we got 34 above so this is correct.
Answer:
20 km/hr
Step-by-step explanation:
Hey
Distance= 15km
Time= 45min
Since the unit for time is hours, we will convert 45 minutes to hours
45/60 = 0.75 hours
Speed= d/t
= 15/0.75
= 1500/75
= 20 km/h
Hope this helps
