Answer:
x=25.69046516
(round as you please)
Answer: 271
Step-by-step explanation:
Answer:
x=-3,y =4 z=-1
Step-by-step explanation:
x+2y-5z=10
y+2z=2
z=-1
Since z = -1, substitute into the second equation
y + 2(-1)=2
y -2 =2
y = 2+2
y=4
We can substitute into the first equation
x+2(4) -5(-1) =10
x+8+5=10
x+13 = 10
x = 10-13
x=-3
For 9, do 0.5*6*9.2*5 to get the total area of the visual triangles, add that to 0.5*6*4.1*5 to get the area of the pentagon and you should get 199.5 cm^2for 10, do 0.5*6.9*8*12 to get the total area of the figure and you should get 331.2 cm^2
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