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3 years ago

The work of a student to solve the equation 2(4x-4)=8+4x+4

Mathematics

1 answer:

Readme [11.4K]3 years ago

3 0

Hi!

The answer to this problem is x=5

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Haley substituted the values of a, b, and c into the quadratic formula below. x = StartFraction negative (negative 10) plus or m

Leokris [45]

Where does that StartFraction ... mess come from? -- I've seen it in other questions.

$x = \dfrac{- -10 \pm \sqrt{(-10)^2 - 4(7)(-2)}}{2(7)}$

Comparing that to the general quadratic formula

$x = \dfrac{-b \pm \sqrt{b^2-4ac}}{2a}$

we see b=-10 (agreeing in both places) a=7 (two places), c=-2

Answer: 7x² - 10x - 2 = 0

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4 years ago

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PLEASE HELP!! Relationship A has a greater rate than Relationship B. This table represents Relationship B. Hours Worked : 2, 4,

const2013 [10]

It would be y=13x and y=12.75x because if you replace the x with any of the numbers of hours it the amount paid per hour go up.

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3 years ago

What is the answer to -x+6-5x=14-2x

worty [1.4K]

Answer:

ok we start form thedrgvbjm,;.Step-by-step explanation:

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3 years ago

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A scuba diver is 30 ft below sea level. Which of the following best describes this situation?

Ghella [55]

Answer is #3. -30
Reason
1 and 2 are absolute values so they are 30, the 4th answer is plus or minus, the question says “below sea level” which is a negative number so it is -30.

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2 years ago

What is cos 45 degrees in simplified radical form?

Ostrovityanka [42]

Answer:

The value of cos 45 degrees in simplified radical form is 0.70710 approximately.

Solution:

Given, Cos of angle 45 degrees.

We have to find the value of the Cos of 45 degrees in radical form.

From trigonometric ratios,

Cos of angle 45 degrees = cos ⁡45 = $\frac{1}{\sqrt{2}}$

Multiplying numerator and denominator with square root of 2

$\begin{array}{l}{=\frac{1}{\sqrt{2}} \times \frac{\sqrt{2}}{\sqrt{2}}} \\\\ {=\frac{1 \times \sqrt{2}}{\sqrt{2} \times \sqrt{2}}} \\\\ {=\frac{\sqrt{2}}{(\sqrt{2})^{2}}} \\\\ {=\frac{\sqrt{2}}{2}}\end{array}$

The value of square root of 2 is 1.414213

$=\frac{1.414213}{2}=0.70710$

Hence, the value of Cos of angle 45 degrees is 0.70710 approximately

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3 years ago