40% u just add the 2 decimals together
Slope intercept form is y=mx+b
Y= y intercept
M = slope
B = x intercept
-2x-11y= 5 get the y by itself
-11y = 2x + 5 divide by -11
y = -2/11x + 5/11
slope is -2/11
Answer:
x = -4 ±√(7)
or in decimal:
x = -1.35 or -6.65
Step-by-step explanation:
y=x²+8x+9
note x-intercepts occur when y = 0,
Hence, x²+8x+9 = 0 (solve this using your favorite method. We will complete the square)
x²+8x+9 = 0 (rearrange)
x²+8x = -9 (complete the square and add factor to both sides)
x² + 8x + (8/2)² = -9 + (8/2)²
[ x + (8/2) ]² = -9 + (8/2)²
[ x + 4 ]² = -9 + (4)²
[ x + 4 ]² = -9 + 16
[ x + 4 ]² = 7
x+4 = ±√(7)
x = -4 ±√(7)
x = -1.35 or -6.65
