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kotegsom [21]
3 years ago
12

Factor of −21x^2+2x+8

Mathematics
1 answer:
Vanyuwa [196]3 years ago
5 0

Answer:

-(7x + 4)(3x - 2)

Step-by-step explanation:

Hope this helps! have a nice day! Please consider making me Brainliest

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If the discriminant of a quadratic equation is positive, which of the following is true of the equation?
Yanka [14]
For this case suppose that we have a quadratic equation of the form:
 ax ^ 2 + bx + c

 The solution to the quadratic recuacion is given by:
 x =  \frac{-b +/-  \sqrt{b^2 - 4ac}}{2a}
 Where,
 The discriminant is:
 b ^ 2 - 4ac

 When the discriminant is greater than zero, then the root is positive, and therefore, we have two positive real solutions.
 Answer:
 
B. it has two real solutions
3 0
3 years ago
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Use an inverse matrix to solve for the system of equations.
IrinaK [193]

Answer:

(-1, 7, 2)

Step-by-step explanation:

we suppose that ax + by + cz = d for the matrix

D = det [ 0    4     7] = 100

              -6   0    -2

               1    2     8

Dx= det [ 14    4     7] = - 100

               10   0    -2

               -3    2     8

Dy= det [ 0    14    7] = 700

               -6   10    -2

                1    -3    8

Dz = det [ 0    4    14] = 200

               -6   0     10

                1    2     -3

So the solution is:

x = Dx/D = -1, y = Dy/D= 7, z =Dz/D = 2

(-1, 7, 2)

have a good day!

4 0
3 years ago
(36.97*100-x)*100 = ???
inna [77]
The answer to X is = 369700
7 0
3 years ago
You have 4 chocolate bars to share evenly among you and your 2 sisters.<br> what is the equation?
Alenkasestr [34]

Answer:

4 divided by 2 = 2

Step-by-step explanation:

If there are 4 chocolate bars and 2 sisters then each sister gets 2.

4 0
3 years ago
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Lucille runs the 50-meter dash in her track meet. How many decimeters long is the race?
Goshia [24]
One decimeter is one tenth, or 0.1, of a meter. So multiply 50 meters by 0.1 (one decimeter). The answer is 5 decimeters in a race that is 50 meters.
6 0
3 years ago
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