(if you don't wanna read all this the answer is at the bottom btw)
move the 7 over to equate the equation to 0
4x^2 - 12x -7 = 0
(ok now you have a (4), b (-12), and c (-7) here you can either use the quadratic formula to solve it or factor the equation)
to factor it, you have to multiply a and c (4*-7 = -28) and find two numbers that multiply to -28 and add to -12
the numbers are -14 and 2. sub those into the equation in place of b
4x^2 + 2x - 14x - 7 = 0
find the lcd of the first two terms and the last two terms to factor them
2x(2x + 1) - 7(2x+1) = 0
(2x -7) (2x+1) = 0
(x-7/2)(x+1/2) = 0
to find the two x values you need to find what values make the equation equal 0 on both sides.
so x is 7/2 or -1/2
Answer:
8 pi
Step-by-step explanation:
When radius is
L = r * Θ = 2 * π/4 = 1.57079633 cm.
When radius is
L = r * Θ = 10 * π/4 = 7.85398163 cm.
Answer:
A
Step-by-step explanation:
Answer:
An estimate could be around 120, but 21 times 6 is 126.
Step-by-step explanation:
Since we know that 20 x 6 is 120, without accounting for ones, that is a pretty accurate answer.
Answer:
High quality pic please i cant see the problem