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3 years ago

What are the solutions to this quadratic equation? x^2+13=8x+3

Mathematics

2 answers:

Alex777 [14]3 years ago

3 0

Answer:

x=4+√6, x=4-√6

Step-by-step explanation:

x^2+13=8x+3

x^2+13-3=8x+3-3

x^2+10=8x

x^2+10-8x=8x-8x

x^2-8x+10=0

a=1 b=-8 c=10

(then use the quadratic formula)

x=4+√6, x=4-√6

PSYCHO15rus [73]3 years ago

3 0

Answer:

x= 4 + 2/10

Step-by-step explanation:

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2 years ago

A company has recently been hiring new employees. Today the company has 29% more employees than it did a year ago. If there are

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5 0

2 years ago

Answer this question Angie and her friends are 3/4 of a pizza.Her brother joe ate 2/3 of what was left.How much did joe eat?

Alja [10]

If Angie and her friends ate 3/4 of a pizza, that means that 1/4 is left.
Joe ate 2/3 of 1/4 of a pizza. To find out how much he ate, multiply 1/4 by 2/3.

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4 0

3 years ago

Read 2 more answers

Solve the following system by any method -8x-8y=0 -8x+2y=-20

iVinArrow [24]

$\fbox{Solution by using Matrix}$

$\text{Linear Equation} = -8x-8y=0 , -8x+2y=-20$

$\text{Rewrite the linear equations above as a matrix}$

$\left[\begin{array}{ccc}8&-8&0\\-8&2&-20\\\end{array}\right]$

$\text{Apply to Row2 : Row2 + Row1}$

$\left[\begin{array}{ccc}8&-8&0\\-8&-6&-20\\\end{array}\right]$

$\text{ Simplify rows}$

$\left[\begin{array}{ccc}8&-8&0\\0&1&10/3\\\end{array}\right]$

$\text{Note: The matrix is now in echelon form.}$ $\text{The steps below are for back substitution.}$

$\text{Apply to Row1 : Row1 + 8 Row2}$

$\left[\begin{array}{ccc}8&0&80/30\\0&1&10/3\\\end{array}\right]$

$\text{ Simplify rows}$

$\left[\begin{array}{ccc}1&0&10/3\\0&1&10/3\\\end{array}\right]$

$\text{Therefore, the solution is}$

$x= \dfrac{10}{3} \ \text{and} \ \ y=\dfrac{10}{3}$

7 0

3 years ago