The easiest way to factor is to find two numbers of the "a" value (the coefficient before $x^{2}$ ) and the factors of the c value (10) that ADD up to give you -9, in this case it would be:

1 -10 --> 1(-10) gives you -10

1 -1 --> 1(-1) gives you -1

adding these together -10 + (-1) = -11 which does not equal -9.

You could stop here and conclude that this is not factorable by inspection.

Another method: using the quadratic formula to find its roots.

Roots: $(\frac{9-\sqrt{41} }{2}, 0)$ and $(\frac{9+\sqrt{41}}{2}, 0)$

7 0

2 years ago

Find the perimeter of the figure to the nearest hundredth. Ps: it is not 30

frutty [35]

Answer:

Perimeter = 36.8 ft

Step-by-step explanation:

Step 1: Add the straight sides together

3+3+3+3+3+3 = 18 ft

Step 2: Find the perimeter of the semi-circles

The formula for the perimeter of semi-circle: 1/2 π × d

Diameter = 12 - 3 - 3 = 6, because the whole length is 12 minus the 6 ft of other stuff.

Now, 1/2π * 6 = 9.4 ft

But, there are two semi-circles so it will be 9.4 + 9.4 = 18.8 ft

Step 3: Add all of them

18 + 18.8 = 36.8 ft

8 0

2 years ago