<span>Factor out 2
x^2 +4x -6 = 0
Take half middle coefficient and square it:
x^2 +4x +4 -6 = 4
(x+2)^2
= 10
x+2
= sqrt(10)
x
= +-sqrt(10) -2</span>
Answer:
B D
Step-by-step explanation:
1st worker produced x pants,
2nd worker produced (x+8) pants.
x+x+8=86
2x=78
x= 39
x+8 = 39+8 = 47
1st worker produced 39 pants,
2nd worker produced 47 pants.
Hailey's mixing two different coffee blends. Represent them by x and y (in pounds). Then x + y = 5 lb, and x = 5 - y.How much puree Sum. beans are we talking about here?
0.20x +0.80y = 0.60(5 lb) Mult all 3 terms by 100 to get rid of factions:
20x + 80 y = 300. Substitute 5-y for x:
20(5-y) + 80y = 300 => 100-20y + 80y = 300 => 60y = 200, so y = 20/6 or 10/3 lb den x = 5-10/3, or x =5/3 lb
Use 5/3 lb of the first blend and 10/3 lb of the second blend to come up with 5 lb of a 60% blend.
<h3>
Answer:</h3>
<em>consider </em><em>D </em><em>for </em><em>a </em><em>second</em><em>. </em><em>(</em><em>a</em><em> </em><em>+</em><em> </em><em>b</em><em>)</em><em> </em><em>×</em><em> </em><em>would</em><em> </em><em>give </em><em>you </em><em>(</em><em>2</em><em>×</em><em>-</em><em>4</em><em>)</em><em> </em><em>+</em><em> </em><em>(</em><em>×</em><em> </em><em>+</em><em> </em><em>2</em><em>)</em><em> </em><em>=</em><em> </em><em>3</em><em>×</em><em>-</em><em>2</em><em> </em><em>which </em><em>is </em><em>not </em><em>a </em><em>quadratic </em>