Subtract of 11 from 20: 20 - 11
The sum of 4 and 9: 4 + 9
Subtract of 11 from 20, then add the sum of 4 and 9:
(20 - 11) + (4 + 9) = 9 + 13 = 22
Answer:
Answer is C!
Step-by-step explanation:
The -2 is the y intercept and 1/3 is the slope.
The slope determines the angle of the line and the Y intercept determines how high or low that line is placed. To graph it I like to use a method called rise over run. First I identify the Y intercept then I identify the slope. From there I start at the Y intercept and Find the line. Definitely look up some tutorials on rise over run to plot equations!
Check all that apply.
2x2 +9x + 4 = 0
Answer:
Step-by-step explanation:
Use quadratic formula:
x=((-b+-sqrt(b^2-4ac))/2a
x=((-9+-sqrt(9^2-4(2)(4))/2(2)
x=((-9+-sqrt(81-32))/4
x=((-9+-sqrt(49))/4
x=(-9+-7)/4
Solution 1:
x=-2/4
x=-1/2
Solution 2:
x=-16/4
x=-4
Now we check:
2(-1/2)^2+9(-1/2)+4=2/4+-9/2+4=1/2+-9/2+4=-8/2+4=-4+4=0 (x=-1/2 works)
2(-4)^2+9(-4)+4=2(16)+(-36)+4=32-36+4=-4+4=0 (x=-4 works)
So the solutions of the equation are x=-1/2 and x=-4
in this case
a=2 b=9 c4
for this equation we have the formula
x1/2 = (-b +- (root of) b2 -4ac) /2a
x1/2 = (-9 +- (root of) 81- 4×2×4)/2×2
x1/2= (-9 +- (root of) 81-32)/4
x1/2 = (-9 +- (root of) 49/4
x1/2 = (-9 +- 7)/4
x1= -9+7/4
x1=-2/4
x1=-1/2
x2= -9-7/4
x2= -16/4
x2= -4