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Galina-37 [17]
2 years ago
14

6x^2 - 21 = 9 solve for x

Mathematics
1 answer:
earnstyle [38]2 years ago
8 0

Answer:

x= \sqrt{5} , -\sqrt{5}

Step-by-step explanation:

Move everything to left side and set it equal to 0

Solve using quadratic formula

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Help me on this please
vaieri [72.5K]
The secound one is 1.125
4 0
3 years ago
What is the equation of a line that passes through the point (8, 1) and is perpendicular to the line whose equation is y=−2/3x+5
Anuta_ua [19.1K]

Answer:

y = \frac{3}{2} x-11

Step-by-step explanation:

We are to find the equation a line that passes through the point (8, 1) and which is perpendicular to a line whose equation isy = - \frac{2}{3} x+5.

We know that the slope of line which is perpendicular to another line is the negative reciprocal of the slope of the other line so it will be \frac{3}{2}.

Then, we will find the y-intercept of the line using the standard equation of a line:

y=mx+c

1=\frac{3}{2} (8)+c

c=-11

Therefore, the equation of the line will be y = \frac{3}{2} x-11.


7 0
3 years ago
Read 2 more answers
Percents are the result of expressing numbers as a part of?
KonstantinChe [14]
If you mean you get them by diving them by 100 or something over 100(as in a fraction) that's the answer, I'm incredibly sorry if it is not what you meant!
4 0
3 years ago
13. Simplify completely:<br> √(64 +16)
mr Goodwill [35]

Answer:

i think the answer is B.4√5

7 0
1 year ago
I need the answer ....
vladimir1956 [14]

Answer:

12.5 feet

Step-by-step explanation:

how to:

lets find the angle that corresponds with the 10 foot side.

to do that we add 50 degrees plus 90 degrees (right angle) to get 140 degrees.

as we know, a triangles angles will total 180 degrees, so 180 - 140 = 40 degrees for the angle corresponding to the 10 foot side.

put these into ratios:

<u>Angle A  </u>  =    <u>Angle B</u>

side a              side b

now plug in our numbers:

<u>50 degrees</u>     =     <u>40 degrees</u>

        X                       10 feet

Cross multiply:

50 (10 feet) = 40 (x)

solve for x:

500 = 40 (x)

500/40 = x

12.5 = x

<u />

3 0
2 years ago
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