To find this equation in standard form, first, write it in factored form. This looks like $y=(x+4)(x-7)$ . Then, multiply the polynomials using the FOIL (First, Outside, Inside, Last) method.

Following the FOIL method, you should multiply the first terms in each binomial, $x*x$ , which equals $x^{2}$ .
Then, the outside terms, $x*-7$ . This equals $-7x$ .
Next, the inside terms, $4*x$ $=4x$ .
Finally, the last terms, $4*-7$ , this equals $-28$ .

Then, add all of the terms together $x^{2} + -7x+4x+-28$ . To get the standard form, combine like terms, this comes out to $x^{2} -3x-28$ .

3 0

3 years ago

REAL-WORLD PROBLEM. Joshua's cell phone bill can be represented by

Evgen [1.6K]

Answer:

Step-by-step explanation: 0.15 and 0.2 are the slope of the line on the graph. The graph of the equation reading y = 0.20x + 25 would show a steeper line bc the bigger the slope the steeper the line.

5 0

3 years ago