Solve 7x²+8x+1=0 using quadratic formula

Answers

Answer 1

Answer: $7x^2+8x+1=0\n\na=7;\ b=8;\ c=1\n\n\Delta=b^2-4ac;\ if\ \DElta > 0\ then\ x_1=(-b-\sqrt\Delta)/(2a)\ and\ x_2=(-b+\sqrt\Delta)/(2a)\n\n\Delta=8^2-4\cdot7\cdot1=64-28=36;\ \sqrt\Delta=√(36)=6\n\nx_1=(-8-6)/(2\cdot7)=(-14)/(14)=-1;\ x_2=(-8+6)/(2\cdot7)=(-2)/(14)=-(1)/(7)\n\nAnswer:x=-1\ \vee\ x=-(1)/(7)$

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1 \frac{1}{6}y-8=6[/tex] please explain how to do this
Which quadratic equation defines the function that has zeros at -8 and 6?
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HELPP PLS AND THANK YOU

Solve the system using any method:
y = x - 3
y = 7x + 3

Answers

Answer:

x=-1, y=-4

Step-by-step explanation:

For this question, you can replace y in one equation with the second one.

This means x-3=7x+3.

From there, you subtract x from each side, giving -3=6x+3.

Subtracting 3from each side makes it -6=6x.

Dividing both sides by 6 leaves x isolated, with a result of x=-1.

You can substitute the value of x into either equation to work out y. I'm using the first one, as it has smaller numbers.

This equation is now y=-1-3, which can be solved for y=-4.

**This content involves simultaneous equations, which you may wish to revise. I'm always happy to help!

Susu is solving the quadratic equation 4x2 – 8x – 13 = 0 by completing the square. Her first four steps are shown in the table.In which step did Susu first make an error?

Step 1
Step 2
Step 3
Step 4

Answers

In the question "Susu is solving the quadratic equation 4x2 – 8x – 13 = 0 by completing the square. Her first four steps are shown in the table. In which step did Susu first make an error?" Susu made her first error in step 2, when she factored out 4 she is supposed to divide 8x by 4. Thus the correct expression for step 2 should be 4(x^2 - 2x) = 13 To complete the solution for the equation: 4(x^2 - 2x + 1) = 13 + 4(1) 4(x - 1)^2 = 13 + 4 4(x - 1)^2 = 17 (x - 1)^2 = 17/4 x - 1 = +/- sqrt(17/4) x = 1 +/- sqrt(17) / 2

Answer:B

Step-by-step explanation:

In a group of 200 high school students, 36 are taking biology, 52 are taking Spanish, and 126 are taking neither biology nor Spanish. If one of these 200 students is to be chosen at random, what is the probability that the student chosen is taking biology but not Spanish?A.

7%

B.

11%

C.

18%

D.

37%

Answers

it 11% this is what i got

What is the solution of this system of linear equations 3y=3/2x+6

Answers

Answer:

C.) No solution

Step-by-step explanation:

3y=3/2x+6

Just divide 3 by both sides.

3/2 divided by 3/1
3/2 * 1/3 = 1/2

y = 1/2x + 2 is the solution

Prove the following theorem indirectly. We will give you a start. Prove that a triangle cannot have two right angles. A triangle cannot have two right angles. Suppose a triangle had two right angles.

Answers

A triangle that has no two right angles is called a scalene triangle. If the triangle has two right angles, it is called isosceles triangle. A triangle with equal sides is called an equilateral triangle.

What is the slope of the line 4x + 6y = 12

Answers

I believe its going to be (3,2) because you take 12 and divide it by 4 which gives you your x value of 3 then you take 12 and divide it by 6 which gives you your y value of 2

4x+6y=12
-4x -4x
6y=-4x+12
-6 -6

Answer: Y= -4x+12

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