<u>Answer:</u>
x = 7.5 km/h
<u>Step-by-step explanation:</u>
• First calculate the distance covered by walking at 3 km/h for 45 minutes ( 0.75 h):
distance = speed × time
= 3 × 0.75
= 2.25 km
• Therefore, she covered 2.25 km of the total journey by walking. Since she was 6 km from the starting point at the end of the entire journey, we can calculate the distance remaining, which she had to run:
distance she had to run = 6 - 2.25
= 3.75 km
• Now we can calculate the speed of the 30 minute (0.5 h) run:
speed = distance ÷ time
= 3.75 ÷ 0.5
= 7.5 km/h
This means that she ran at 7.5 km/h for half an hour.
∴ x = 7.5
30f+24g-6 because you distribute
Answer:
f(-2/3)=-1
Step-by-step explanation:
f(x)=3x+1
f(-2/3)=3*(-2/3)+1
f(-2/3)=-2+1
f(-2/3)=-1
Lets solve the equation and see the steps so it is easier.
x/2 - 8 = 14
Add eight to both sides of the equation to get x/2 alone.
x/2 - 8 + 8 = 14 + 8
x/2 = 22
Multiply both sides by two to get x alone.
x/2 • 2 = 22 • 2
x = 44
Now we see the steps we made. Lets look at the choices. Your answer is the third choice. I hope this helps!