Answer:
1km=7 mins
3km = 21 mins
Step-by-step explanation:
Answer:
4cm
Step-by-step explanation:
given volume = 48πcm³
height = 9cm
r = ?
the formula for finding the volume of a cone = 1/3 πr²h
v = πr²h/3
make r" the subject of the formula
by cross multiplying,
3v = πr²h
divide both sides by πh
3v/πh =r²
r = √3v/πh
r= √3 × 48π/9π
π cancels π
r = √144/9
r = 12/3
r = 4cm
therefore the radius of the cone is 4cm
Answer: The system of equations are
0.1x + 0.05y = 1.9
y = x + 2
Step-by-step explanation:
The worth of a dime is 10 cents. Converting to dollars, it becomes
10/100 = $0.1
The worth of a nickel is 5 cents. Converting to dollars, it becomes
5/100 = $0.05
Let x represent the number of dimes that Victoria has.
Let y represent the number of nickels that Victoria has.
Victoria has 1.90 dollars worth of nickels and dimes. The expression would be
0.1x + 0.05y = 1.9
She has two more nickels than dimes. This is expressed as
y = x + 2
Answer:
x² + y² = 9
Step-by-step explanation:
The equation of a circle centred at the origin is
x² + y² = r² ← r is the radius
Here r = 3, hence
x² + y² = 3² ⇒ x² + y² = 9
