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eimsori [14]
2 years ago
9

Find a possible value of b. 5x2 - bx - 8​

Mathematics
1 answer:
pychu [463]2 years ago
3 0

Answer:

Step-by-step explanation:

Without more input from you, it's hard to find an exact value for b.  However, b may take on a large range of values.  b = 10 and b = -3 (chosen arbitrarily) are acceptable choices.

Take a look at the quadratic formula.  The discriminant is b^2 - 4ac.  There is nothing about this equation that restricts or forbids the use of any value of b.

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Consider the following pair of equations: y = −2x + 8 y = x − 1 Explain how you will solve the pair of equations by substitution
Rzqust [24]
Y = -2x +8
y = x-1

y=y

-2x+8 = x-1

-3x = -1 -8

-3x = -9

3x = 9

x = 3


 
6 0
3 years ago
The vertical cross-section of a solid is shown below has 10 in every side angle
Vlad1618 [11]
I think I know what it forms - a cone!!

I'm guessing that the angles at the end are 10 degrees so that would make angle CAB equal 5 degrees.
Line AB would be the radius of the "upper cone".
Line BC is 12/2 or 6
tangent (A) = BC / AB
tangent (5) = 6 / AB
AB = 6 / tan(5)
AB = 6 / 0.087489
AB = <span> <span> <span> 68.58 which is the radius of the "upper cone".</span></span></span>
Cone Volume = (PI * radius^2 * height) / 3
Cone Volume = (PI * 68.58 * 68.58 * 6) / 3
Cone Volume = <span> <span> <span> 29,551
That is just the "upper cone volume.  So, we multiply </span></span></span><span><span> <span> <span> 29,551 * 2
and get 59,102 which is the volume of the entire solid.
</span></span></span> </span>
Source for cone volume:
http://www.1728.org/volcone.htm


3 0
3 years ago
What is the distance between the points (4, 7) and (4, −5) ?
Ray Of Light [21]

Answer:

12 units

Step-by-step explanation:

the 2 points have the same x but different y so you would find the difference of the y values

|-5|+|7|=12

12units away

3 0
3 years ago
using the standard equation of an ellipse whose major axis is along the x axis, a=5 and b=3. what is the distance between the ce
dmitriy555 [2]
With ellipse the equation to find c or the distance from the center to the foci is c^2 = a^2 - b^2.  So if you plug those numbers in you get:
c^2 = 25 - 9
c^2 = 16
c = 4
The distance from the center to each foci is 4
5 0
3 years ago
HELP?! PLEASE!! SUPER DESPERATE!! How many gallons of a 60% antifreeze solution must be mixed with a 60 gallons of 15% antifreez
Ket [755]

bellamore

Middle SchoolMathematics 5+3 pts

x (.60) + 60 (.15) = (x+60) .50

distribute

.60x +9 = .5x +30

subtract  .5x from each side

.1x +9 = 30

subtract 9 from each side

.1x = 21

 divide by .1

x = 210

You will need 210 gallons of 60% antifreeze


8 0
3 years ago
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