Which equation has the components of 0 = x2 – 9x – 20 inserted into the quadratic formula correctly? x = startfraction negative 9 plus or minus startroot (negative 9) squared minus 4(1)(negative 20) endroot over 2(1) endfraction x = startfraction 9 plus or minus startroot (negative 9) squared minus 4(1)(20) endroot over 2(1) endfraction x = startfraction 9 plus or minus startroot (negative 9) squared minus 4(1)(negative 20) endroot over 2(1) endfraction x = startfraction negative 9 plus or minus startroot (negative 9) squared + 4(1)(negative 20) endroot over 2(1) endfraction

Step-by-step explanation:

Recall that the quadratic formula gives you the pattern to follow in order to find the solutions to a quadratic equation of the form:

It tells us that we need to use the parameters and in the following formula in order to get the answers for the x-values that solve it:

so, in our case, , , and

then, replacing these values in the formula, we obtain:

Which looks like the third expression you are listing (although it is a little hard to read)

answer:

given the linear inequality :

add 2y to both sides we get;

simplify:

add 12 to both sides of an equation;

simplify:

divide both sides by 2 we get;

or

the related equation for the inequality equation [1] is;

y-intercepts defined as the graph crosses the y-axis.

substitute x =0 in [2] to solve for y;

y = 6

x-intercepts defined as the graph crosses the x-axis.

substitute value y = 0 to solve for x;

subtract 6 from both sides we get

multiply both sides by 2 we get;

or

x = -12

now, plot these point (0, 6) and (-12, 0) on graph as shown below and shade the graph below the solid line.