Answer:

Step-by-step explanation:
SOLVE BY SUBSTITUTION:
STEP 1: Replace all occurrences of
with
in each equation.

STEP 2: Solve for
in the first equation.

STEP 3: Replace all occurrences of
with
in each equation.

Answer:
90π cm²
Step-by-step explanation:
Given: Radius of circular base= 5 cm
height= 12 cm
Now finding the surface of cone.
Formula; Surface area of cone= 
Where; r= radius
l= slant height
B is the area of base, which is circle.
Area of circle (B)= πr²
Area of circle (B)= 
∴ Area of circle (B)= 
Finding slant height (l)
Formula; 
⇒l = 
∴ l= 
Next, using the formula for finding surface area of cone.
Surface area of cone= 
⇒ Surface area of cone= 
∴ Surface area of cone= 90π cm²
Answer:
3c = 33
Step-by-step explanation:
(4,20) is the only solution that works being that ur inequalities contain no equal signs.