1/x = 1/2 That's what you got with your equation. So far so good. That does not tell you what x is though. You have go just a bit further.
1/x = 1/2 Cross multiply
x = 1 * 2
x = 2 It takes 2 hours to complete with all three machines working.
Answer:
1.7ft
Step-by-step explanation:
Given data
Volume of tank= 300π 〖ft〗^3
Height of tank= 10ft
The expression for the volume of a cylinder is given as
Volume= πr^2h
Substitute
300π = π *r^2*10
300= r^2*100
3= r^2
r= √3
r= 1.7 ft
Hence the radius of the cylinder is 1.7ft
Answer:
23 students
Step-by-step explanation:
We assume the wording "when 5 rows of seats are filled, 2 seats remain empty" means that there are 2 empty seats in the 5th row (which then would <u>not</u> be filled).
If n is the number of seats in a row, we think the problem statement means ...
5n -2 = 4n +3
n = 5 . . . . . . . . . . add 2-4n
Then 5(5)-2 = 23 = 4(5) +3.
There are 23 students in the class.
Answer:
x = 10 and BD = 74
Step-by-step explanation:
AE and CE are equal, so we can set those 2 values equal to each other to find x.
3x + 7 = 37
3x = 30
x = 10
BD will be equal to AE + CE because that is a property of the rectangle.
So AE + CE = 37 + 37 = 74.
BD = 74
2. 3.14 times the radius squared