2 years ago

Solve using the quadratic formula.

1 answer:

5 0

The quadratic formula is:
$x = \frac{ - b + - \sqrt{ {b}^{2} - 4ac} }{2a}$
so...
$x = \frac{ - ( - 1) + - \sqrt{( - 1)^{2} - 4(4)( - 7) } }{2(4)}$
so simplified from calculator work

$x = \frac{1 + \sqrt{113} }{8} \: and \: \frac{1 - \sqrt{113} }{8}$

You might be interested in

1)Which of these systems of linear equations has an infinite number of solutions?

Alja [10]

1) B)3x+6y=22
6x+12y=44
because the equations are equivalent to each other
2*(3x+6y=22) -----> 6x+12y=44

2) 5x+10y=15 should be multiplied by -2, to get 5x*(-2)=-10x, and x then can be eliminated
A)-2

7 0

3 years ago

How to simplify 6x^2y^-3/x^-5

mixas84 [53]

6x^7/y3 is the answer

8 0

3 years ago

Jackie won tickets playing the bowling game at the local arcade. The first time, she won 6 tickets. The second time, she won a b

Alborosie

Answer:

it might be 48 tickets.

3 0

2 years ago

Read 2 more answers

In a triangle, the measure of the first angle is twice the measure of the second angle. The measure of third angle os 88 degrees

Volgvan

Answer:

Answers: 46, 23, and 111

Step-by-step explanation:

To answer, we need to know the angles. Therefore, give each angle a name. Angle 1 will be x, 2 will be y, 3 will be z. So, using this system of equations:

x=2y

z=y+88

x+y+z=180

Substituting, z = 1/2(x)+88, now plug z into the third equation:

x+1/2(x)+1/2(x)+88=180

this simplifies to 2x+88=180

subtracting 88 from both sides leaves 2x=92

x=46

plug this in to the first equation: 46 = 2y, so y = 23

plug this into the third one leaves z = 111

Hope this helps!

3 0

3 years ago

Vertex and axis of symmetry f(x)=2x^2-16x-17 PLEASE HELP

Law Incorporation [45]

The vertex is at (4, -49) and the axis of symmetry is at x= 4.

To find the vertex of this equation, use this method: $( \frac{-b}{2a})$

a=2
b=-16

This will help get your x value and the axis of symmetry. To find the y value of the vertex, insert the x value, 4 to get your y value, -49.

8 0

3 years ago