2x² + 4x - 16 = 0
2(x²) + 2(2x) - 2(8) = 0
 2(x² + 2x - 8) = 0
 2 2
 x² + 2x - 8 = 0
 x = -(2) ± √((2)² - 4(1)(-8))
 2(1)
 x = -2 ± √(4 + 32)
 2
 x = -2 ± √(36)
 2
 x = -2 ± 6
 2
 x = -1 ± 3
 x = -1 + 3 U x = -1 - 3
 x = 2 x = -4

7 0

3 years ago

Find the value of x.

kirill [66]

9514 1404 393

Answer:

x = 6

Step-by-step explanation:

The angle bisector divides the sides proportionally.

(6x -1)/42 = (10x +5)/78

13(6x -1) = 7(10x +5) . . . . . . . multiply by 546 = LCM(42, 78)

78x -13 = 70x +35 . . . . . . . . eliminate parentheses

8x = 48 . . . . . . . . . . . . . . . . add 13-70x

x = 6 . . . . . . . . . . . . . . . . . divide by 8

6 0

3 years ago

A line contains the points (8, 9) and (–12, –7). Using point-slope form, write the equation of the line that is parallel to the

navik [9.2K]

The lines have equal gradients;
m $\frac{16}{20} = \frac{4}{5}$

Equation of line 2;
y=mx+c
y= $\frac{4}{5}$ x+c
-15= $\frac{4}{5*(-5)}$ +c
c=-11
y=4/5x-11

7 0

3 years ago

Please Help me, what the answer

Rus_ich [418]

It’s either 1. Or 2. I’m really not sure which one tho so sorry! There’s not enough information given but if I had to guesstimate I would say 1.

6 0

3 years ago