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Nataly_w [17]
3 years ago
8

The work of a student to solve a set of equations is shown:

Mathematics
2 answers:
11Alexandr11 [23.1K]3 years ago
6 0
The student made error in step 2 because negative multiplied by positive is negative. Also negative multiplied by negative is positive
timama [110]3 years ago
5 0

Answer:

The answer is C. Step 2

Hope This Helps!

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What is the solution set for z+10=z-2
photoshop1234 [79]

Answer: No Solution.

There are no values of z that make the equation true.

Step-by-step explanation:


5 0
2 years ago
Help me please !!!
Nat2105 [25]

Answer:

For 3x^2+4x+4=0

Discriminant= = -32

The solutions are

(-b+√x)/2a= (-2+2√-2)/3

(-b-√x)/2a= (-2-2√-2)/3

For 3x^2+2x+4=0

Discriminant= -44

The solutions

(-b+√x)/2a= (-1+√-11)/3

(-b-√x)/2a= (-1-√-11)/3

For 9x^2-6x+2=0

Discriminant= -36

The solutions

(-b+√x)/2a= (1+√-1)/3

(-b-√x)/2a= (1-√-1)/3

Step-by-step explanation:

Formula for the discriminant = b²-4ac

let the discriminant be = x for the equations

The solution of the equations

= (-b+√x)/2a and = (-b-√x)/2a

For 3x^2+4x+4=0

Discriminant= 4²-4(3)(4)

Discriminant= 16-48

Discriminant= = -32

The solutions

(-b+√x)/2a =( -4+√-32)/6

(-b+√x)/2a= (-4 +4√-2)/6

(-b+√x)/2a= (-2+2√-2)/3

(-b-√x)/2a =( -4-√-32)/6

(-b-√x)/2a= (-4 -4√-2)/6

(-b-√x)/2a= (-2-2√-2)/3

For 3x^2+2x+4=0

Discriminant= 2²-4(3)(4)

Discriminant= 4-48

Discriminant= -44

The solutions

(-b+√x)/2a =( -2+√-44)/6

(-b+√x)/2a= (-2 +2√-11)/6

(-b+√x)/2a= (-1+√-11)/3

(-b-√x)/2a =( -2-√-44)/6

(-b-√x)/2a= (-2 -2√-11)/6

(-b-√x)/2a= (-1-√-11)/3

For 9x^2-6x+2=0

Discriminant= (-6)²-4(9)(2)

Discriminant= 36 -72

Discriminant= -36

The solutions

(-b+√x)/2a =( 6+√-36)/18

(-b+√x)/2a= (6 +6√-1)/18

(-b+√x)/2a= (1+√-1)/3

(-b-√x)/2a =( 6-√-36)/18

(-b-√x)/2a= (6 -6√-1)/18

(-b-√x)/2a= (1-√-1)/3

6 0
3 years ago
Help po mga kuya, ate.​
Agata [3.3K]

Answer:

sorry

Step-by-step explanation:

i have to comment to get points to ask questions

8 0
2 years ago
What is a possible volume for this cylinder if the diameter is 8 cm? Explain your reasoning.
lesantik [10]

Answer:

The formula for the volume of a cylinder is pi*r^2*h

r=radius= 1/2 diameter

h= the height

pi=3.14...

just get the height and plug it in

Step-by-step explanation:

5 0
3 years ago
Six added to three times a number is equal to four less than five times the number what is the number
likoan [24]
3x+6= 5x-4
6= 2x+4
10=2x
5=x
6 0
3 years ago
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