Answer:
3x6+3x1+4x3
Step-by-step explanation:
Answer:
y = 10-2x
Step-by-step explanation:
2x+y=10
y=10-2x
Answer:
12.57
Step-by-step explanation:
the formula for the area of a circle is 
the diameter is 2 times the radius, so dividing it by 2 gives you a radius of 2
substitute the 2 for the r in the formula and solve

4
≈12.57
That would turn into 3x-5