Answer:
x=8
y=-3
Step-by-step explanation:
let
x+y=5........ equation 1
x-4y=20....... equation 2
x=20+4y
substituting the value of x in eq 1
x+y=5
20+4y+y=5
5y=5-20
y=-15/5
y=-3
again putting the value of y in eq 2
x=20+4y
x=20+4(-3)
x=20-12
x=8
Answer:
x=-1/2, 7/2
Step-by-step explanation:
move all terms to the left side and set them equal to zero. then set eac factor to zero
Answer:
576 cm^3
Step-by-step explanation:
Express this volume formula as V = π r^2 h, where the " ^ " symbol indicates exponentiation. Substitute 4 for r (this is half the diameter), 12 cm for h, and 3 for π: V = 3*(4)^2*12 cm^3, or V = 576 cm^3.
A central angle is an angle made by 2 radii. Seeing as they want the measure of the angle that represents industry pollution, that would be 40% of the total 360 degrees.
40% = 0.4
0.4 × 360 = 144
The measure is 144 degrees.
