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Answer:
92.31 km
Step-by-step explanation:
Combined speed = 50+80
= 130 km/hour
Time = 100/130 = 10/13 hours to collide
Speed × time = distance
distance = 10/13 × 120
= 92.30769231 km
Answer:
11 ways
100 Pennies & 0 Dimes
90 Pennies & 1 Dimes
80 Pennies & 2 Dimes
70 Pennies & 3 Dimes
60 Pennies & 4 Dimes
50 Pennies & 5 Dimes
40 Pennies & 6 Dimes
30 Pennies & 7 Dimes
Step-by-step explanation:
Answer:
Step-by-step explanation:
h=16t^2+98=?
subtract 98 from both sides to get
h-98=16t^2
(the 98 on the right cancels)
now divide by 16 on both sides
h-98/16=t^2
(the 16 on the right cancels)
lastly take the square root on both sides
square root(h-98/16)= t
if you know what h is fill it in and it will give you your answer
Im not 100% sure!!
Answer:
- x=8, x=2
- no solution
- no solution
Step-by-step explanation:
For the equation ...
y = a(x -h)² +k
you can find the x-intercepts by setting y=0 and solving for x.
0 = a(x -h)² +k
-k = a(x -h)² . . . . . . subtract k
-k/a = (x -h)² . . . . . divide by a
±√(-k/a) = x -h . . . . take the square root
h ± √(-k/a) = x . . . . add h . . . . this is the general solution
__
So, for each of your problems, fill in the corresponding numbers and do the arithmetic. If (-k/a) is a negative number, the square root gives imaginary values, so there is "no solution".
1. x = 5 ± √9 = {5 -3, 5 +3} = {2, 8} . . . . the x-intercepts are 2 and 8
2. x = -3 ± √(-2) . . . . . . no solution; the roots are complex
3. x = 5 ± √(-8/4) . . . . . no solution; the roots are complex
