Answer:
Step-by-step explanation:
nine more then a number is eleven
let the number be n
n + 9 = 11 <=== ur equation
n = 11 - 9
n = 2
Answer:
√7/22
Step-by-step explanation:
p=√7
b=22 ( R as reference)
tanR=p/b
√7/22
You can round yourself.
Answer:
D
Step-by-step explanation:
because the bus is 8 and you spin it 20 times
8/20=2/5
Answer:
System of equations:
20x + 30y = 650
x + y = 25
Time underwater = 10 hours
Time at the surface = 15 hours
Step-by-step explanation:
Let x = time underwater at 20 km/h.
Let y = time on the surface at 30 km/h.
speed = distance/time
distance = speed * time
distance underwater: 20x
distance on the surface: 30y
total distance: 650
20x + 30y = 650
total time: x + y
total time: 25
x + y = 25
20x + 30y = 650
x + y = 25
20x + 30y = 650
-20x - 20y = -500
--------------------------------
10y = 150
y = 15
x + y = 25
x + 15 = 25
x = 10
Answer:
6 cm
Step-by-step explanation:
Area of a rectangle = length * width
Here, length and width are 12 cm and 3 cm, so
Area = 12*3 = 36 cm squared
Area of a square = side * side
36 = 6*6
Thus, side = 6 cm