Answer:
100
Step-by-step explanation:
Number = x
0.8x - 0.75x = 5
0.05x = 5
x = 100
Answer:
x=−8 and y=−4
Step-by-step explanation:
8x−17y=4;−8x+15y=4
add eqn1 and 2
to eliminate x
you will get y=-4
put it zin eqn 1
x=-8
Answer:
9 cans
Step-by-step explanation
Side length of the squared ceiling = 15m
Area of a square = side x side = 15 x 15 = 
Area of paint each can covers = 25m
∴Number of paint cans needed to paint the entire ceiling =
= 9 cans
Answer:
1,620,000 meters
Step-by-step explanation:
Speed- 450 meter----- 1 second
1 minute = 60 seconds
60 minutes (1 hour) = 3600 seconds
Distance in 1 hour
1 ------ 450
3600---- X
X= 3600 x 450
x= 1,620,000 meters