Answer: 5/x3-1/x2+8/x-40 is not polynomial. The rest are polynomial.
Step-by-step explanation:
Polynomials cannot have a number divided by a variable so 5/x3-1/x2+8/x-40 can't be a polynomial.
Answer
x = 2 and y = 3
Use substitution
3x = 15 - 3 (13 - 5x)
x = 2
Plug in x
3 (2) = 15 - 3y
y = 3
Hi there!
We can solve by setting both equations equal to each other:
.5x + 4 = -.25x² + 5
Move everything to one side:
0 = -.25x² - .5x + 1
Multiply both sides by 4 to cancel out the decimals:
0 = -x² - 2x + 4
Factor out negative from both sides:
0 = x² + 2x - 4
Use the quadratic formula:
Plug in the corresponding terms:
Simplify:
Simplify the radical to reduce:
Divide all terms by 2:
The correct question is
Find the volume of a <span>cylinder with base area 25 pi cm squared and height 3 cm more than the radius
we know that
</span>[the volume of a cylinder]=[area of the base]*[height]
[area of the base]=25pi cm²
[area of the base]=pi*r²--------> r²=[area of the base]/pi----> r²=25pi/pi
r²=25--------> r=5 cm
the height is 3 cm more than the radius
so
height=3+5-----> height=8 cm
[the volume of a cylinder]=[25pi]*[8]------> 200pi cm³
the answer is
200pi cm³