Answer:
4.6 hours
Step-by-step explanation:
we first need to calculate the total distance he covered and total time taken whole for the journey.
Distance= speed X time
time = Distance/speed
let the total distance be X. he covers 2/5 if the journey first.
2/5 = 0.4
Time = 0.4x/45 hours
the remaining journey is 3/5x
he covers 1/3 X 3/5= 0.2x
time taken = 0.2/90 X hours
the remaining distance = 100× 1.2 = 120km
we add 0.4x + 0.2x to get the fraction he had covered
0.6x.
the remaining distance was X - 0.6x = 0.4 X
thus 120 km represents 0.4x of the journey
we calculate now the value of X
0.4x = 120
X = 300km
Total time taken = 0.4x/45 + 0.2/90 + 1.2 hours
replace X to get time
2.7 hours + 0.7 hours + 1.2 hours
= 4.6 hours
Answer:
7. 84 feet
9. 12320 yd
11. 30 inches
12. 26400 ft
13. 19 ft
hope this helps
have a good day :)
Step-by-step explanation:
Answer:
g(3)= -1
Step-by-step explanation:
from the graph f(3)= -1
so, g(3) = -4 * (-1) + 7 = 12
The solution to the system of equation is (-1/3, 2)
<h3>System of equation</h3>
Given the system of equation below;
y = 6x+4
9x+y = -1
Substitute equation 1 into 2 to have:
9x + 6x + 4 = -1
15x + 4 = -1
15x = -5
x = -5/15
x = -1/3
Substitute x = -1/3 into equation 1 to have:
y = 6(-1/3) + 4
y = -2 + 4
y = 2
Hence the solution to the system of equation is (-1/3, 2)
Learn more on system of equation here: brainly.com/question/14323743
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