Answer:
( , 1 )
Step-by-step explanation:
Given the 2 equations
4x + 3y = 6 → (1)
4x - y = 2 → (2)
Subtract (2) from (1) term by term to eliminate x
4x - 4x + 3y - (- y) = 6 - 2, that is
4y = 4 ( divide both sides by 4 )
y = 1
Substitute y = 1 into either of the 2 equations and solve for x
Substituting into (1)
4x + 3(1) = 6
4x + 3 = 6 ( subtract 3 from both sides )
4x = 3 ( divide both sides by 4 )
x =
solution is ( , 1 )
Answer:
The exact value of its surface area = 144π m²
The exact value of its volume = 288π m³
Step-by-step explanation:
∵ The diameter of the sphere is 12m
∴ The radius of the sphere = 12 ÷ 2 = 6m
∵ The surface area of the sphere = 4πr²
∴ The surface area = 4 × π × 6² = 144π m²
∵ The volume of the sphere = 4/3 πr³
∴ The volume = = 288π m³