Answer:
4x + 7y
Step-by-step explanation:
4(x+y) + 3y
Distribute
4x+ 4y+ 3y
add like terms
4x + 7y
Answer:
d=13
Step-by-step explanation:
step 1) combine like terms
8d-3d-12=53
5d-12=53
isolate d
5d-12+12=53+12
5d=65
d=13
Answer:
area = 24 cm²
Step-by-step explanation:
area = 1/2 x 6 x 8 = 24 cm²
Answer:
The average speed of car is 67 kilometers per hour.
Step-by-step explanation:
Given that:
Distance travelled in one hour = 45 km
Distance travelled in next 2 hours = 78*2 = 156 km
Total distance = 45+156 = 201
Total time = 1+2 = 3 hours
Average speed of the car = 
Average speed of the car = 
Average speed of the car = 67 km/hr
Hence,
The average speed of car is 67 kilometers per hour.