Answer:
By factoring
Step-by-step explanation:
4x^2+25=20x then:
4x^2-20x+25=0
factoring:
(2x-5)(2x-5)=0
2x=5, x=2.5
Answer:
Number 4 has an exponent of 4.
Step-by-step explanation:
The ^ thingy is referring to an exponent. The number after that symbol is the exponent. Therefore, the last answer is the solution to this problem.
Answer:
B
Step-by-step explanation:
The equation of a circle is denoted by: 
, where (h, k) is the center and r is the radius.
Here, we see that the center is (0, 0), so h = 0 and k = 0. Also, the radius is 
, so r = and 
.
Then we can write our equation:
The answer is B.
Hope this helps!
Answer:
4×sqrt(5) inches
Step-by-step explanation:
Pythagorean theorem states that (for right triangles) if you square each shorter side and add those together, you will get the sum of the longest side (hypotenuse) squared.
This is commonly written as:
a^2 + b^2 = c^2, where c is the hypotenuse.
((For right triangles this will always be opposite the 90° angle.))
Since you know one of the shorter sides and the hypotenuse, rewrite the equation as such:
c^2 - b^2 = a^2, where a is the unknown length
This goes to:
sqrt(c^2 - b^2) = a
sqrt((12in)^2 - (8in)^2) = a
sqrt(144sqin - 64sqin) = sqrt(80sqin) = a
This simplifies to:
sqrt(16sqin)×sqrt(5sqin) = 4in×sqrt(5sqin) = a
The answer would have to be Michigan. They had a flat income tax in 2009
