Atraeus is solving the quadratic equation by completing the square.7x^2 – 14x + 6 = 0 7x2 – 14x = –6 A(x^2 – 2x) = –6What is the value of A?
Answers
7x^2-14x=-6
then we have
A(x^2-2x)=-6
what is A?
hmm (this should be painfully obvous, but if not, here are steps)
7x^2-14x=-6
A(x^2-2x)=-6
7x^2-14x=-6=A(x^2-2x)
7x^2-14x=A(x^2-2x)
undistribute 7
7(x^2-2x)=A(x^2-2x)
divide both sides by (x^2-2x)
7=A
A=7
Answer:
D
Step-by-step explanation:
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How to factorise this?!4x-14xy
Answers
Answer:
720
Step-by-step explanation:
120/10 to find his feet per second which is 12 feet per second
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Answers
All the angles around a point on one side of a line add up to 180°.
A). Look at the angles at point-D, above the line.
You've got 40° and you've got a right angle ... 90°.
Those two angles add up to (40° + 90°) = 130°.
How much more is needed to make 180° ?
(180° - 130°) = 50°. That's angle 'x'.
B). Look at the angles at point-C, below the line.
You've got 55°.
How much more is needed to make 180° ?
(180° - 55°) = 125°. That's angle 'y'.
m∠x = 50°
m∠y = 125°
m∠x + 40° = 90°
x + 40 = 90
- 40 - 40
x = 50°
m∠y + 55° = 180°
y + 55 = 180
- 55 - 55
y = 125°
Answers
Answer:
The graphs are attached.
DON'T ANSWER IF YOU'RE UNSURE!!! I need actual help, please don't just take my points. :c
Answers
Answers
Answer: First option is correct.
Step-by-step explanation:
Since we have given that
If the factored form is given by
Then its standard form will be given by
if factored form is given by
Then its standard form will be given by
Hence, only first option is correct.
Answer:
Factored form: (3x-4)(x+2)
Standard form: 3x^2+2x-8
Step-by-step explanation:
3x(x+2)-4(x+2)=(3x-4)(x+2)
3x(x+2)-4(x+2)=(3x^2+6x)-(4x+8)
=3x^2+6x-4x-8
=3x^2+2x-8
A.1.5
B.2.7
C.3.0
D.3.8
Answers
Mean shoe size of the students in a math class: µ=7.5
Standard deviation: σ
Most of the shoe sizes (x) fall within 1 standard deviation:
µ-1σ<x< µ+1σµ-σ<x< µ+σ
or between a size 6 and a size 9:
6<x<9
Comparing µ-σ<x< µ+σ with6<x<9:
µ-σ=6 or µ+σ=9
Replacing µ=7.5 above:
7.5-σ=6 or 7.5+σ=9
Solving for σ:
7.5-σ-7.5=6-7.5 or 7.5+σ-7.5=9-7.5
-σ=-1.5 or σ=1.5
σ=1.5 or σ=1.5
Then σ=1.5
SD = square root of (variance)
Variance is the average of the squared differences from the Mean.
Variance = (6-7.5)^2 + (9-7.5)^2 / 2
Variance = 2.25
SD = square root (2.25)
SD = 1.5
The correct answer is A. 1.5