Answer & Step-by-step explanation: 4.58
<em>PEMDAS:</em>
<em>Parenthesis first! (8 + 7 + 3.3) = 18.3</em>
<em>Exponents second! </em>
<em> = 1/4 = 0.25</em>
<em>Multiply third and solve! 18.3 x 0.25 = 4.575</em>
<em>Round if needed! </em><em>4.575</em><em> = </em><em>4.58</em><em> = </em><em>4.6</em><em> = </em><em>5</em>
The answer for the first one is <em><u>Congruent</u></em> and for the second for the second is <em><u>No</u></em>
Answer:
2x^2 = 6x - 5.
-x^2 - 10x = 34.
These have only complex roots/
Step-by-step explanation:
3x^2 - 5x = -8
3x^2 - 5x + 8 = 0
There are complex roots if the discriminant 9b^2 - 4ac) is negative.
Here the discriminant D = (-5)^2 - 4*-5*8 = 25 + 160
This is positive so the roots are real.
2x^2 = 6x - 5
2x^2 - 6x + 5 = 0
D = (-6)^2 - 4*2*5 = 36 - 40 = -4
So this has no real roots only complex ones.
12x = 9x^2 + 4
9x^2 - 12x + 4 = 0
D = (-12)^2 - 4*9 * 4 = 144 - 144 = 0.
- Real roots.
-x^2 - 10x = 34
x^2 + 10x + 34 = 0
D = (10)^2 - 4*1*34 = 100 - 136 = -36.
No real roots = only complex roots.
4.4 inches because once you add 2 and 2 you 50 then add ten and you get 60
