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3 years ago

What is differnce when there is parentheses around a number being squared?

1 answer:

5 0

When parentheses are around a number being squared, the output value will always be positive.

For example: -2² vs (-2)²
-2² means the negative of the square of two, or -4
(-2)² means the square of negative two, or 4

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I need help with this does anyone understand this?

soldier1979 [14.2K]

Answer:

Let y = f(x)

$= > y = \frac{19}{ {x}^{3} }$

$= > {x}^{3} = \frac{19}{y}$

$= > x = \sqrt[ 3]{ \frac{19}{y} }$

${f}^{ - 1} (x) = \frac{ \sqrt[3]{19} }{ \sqrt[3]{x} }$

<h2>option A</h2>

4 0

3 years ago

Find an equation of the line that passes through the points (-0.5,0.75) and (0.75,-0.5)

Keith_Richards [23]

The equation of the line can be shown using the slope intercept form that is

y= mx+b

where m is the slope and b is the y intercept

So firstly we have to find the value of slope m

To find the value of slope m we apply the formula

$m= \frac{( y_{2} - y_{1})}{( x_{2} - x_{1})}$

So we can plug the values using the two given points

(-0.5,0.75) and (0.75,-0.5)

$m= \frac{(-0.5-0.75) }{(0.75-(-0.5))} = \frac{-1.25}{1.25} = -1$

So m = -1

Plug m=-1 in the equation we get

y= -1x +b

Now we have to find the value of b

to find the value of b , we plug any one pint in the equation

0.75 = -1(-0.5) +b

0.75 = 0.5 +b

Subtract 0.5 from both sides

0.25 = b

b= 0.25

Now plug the value of b , in the equation

we get

y = -1x +0.25

hence the equation of the line is y = -1x +0.25

8 0

3 years ago

{ 5x - y = 5 { 5x - 3y = 15 solve the system using substitution

Iteru [2.4K]

Answer:

Not sure sorry,but can you please help me on the following:

Step-by-step explanation:

Length of a rectangle is 5 cm longer than the width. Four squares are constructed outside the rectangle such that each of the squares share one side with the rectangle. The total area of the constructed figure is 120 cm2. What is the perimeter of the rectangle?

8 0

2 years ago

Read 2 more answers

3/8 of students in school ride the bus, what percent does not

Stells [14]

The answer is going to be 87.5%

6 0

3 years ago

-0.4a + 3 = 7 a=? please help

AleksandrR [38]

Answer:

a = -10