Answer:
1, -4.5
Step-by-step explanation:
What do you mean by estimating the solution?
y=-6x+4
x-4(-6x+4)=19
x+24x-16=19
25x=25
x=1
1-4y=19
-4y=18
y=-4.5
Answer: Answer is B hope this helps
Step-by-step explanation:
Answer: B.pi/2
ABCD is a square
=> Δ ABD is a isosceles right triangle at A
using pythago theorem, we have:
AB² + AD² = BD²
=> 2AD² = 4
⇔ AD² = 2
⇒ AD = √2
through O, draw EF parallel to AD and BC
=> EF is diameter
because EF//AD => EF = AD = √2 (because circle O is inscribed the square ABCD)
=> the area of the circle is 
Step-by-step explanation:
Answer:
Volume of the pyramid = 16m³ or 16 cubic meters.
Step-by-step explanation:
The equation for the volume of a pyramid is:

where b = area of base and h = height.
In this case, the base is a square with a side length of 4m.
Area of the square base = (4m)² = b = 16m²
h = 3m
Insert b and a into the volume of a pyramid equation.

= 16m³
Volume of the pyramid = 16m³ or 16 cubic meters.