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3 years ago

What is the value of x in the equation 2x + 2 equals -52

Mathematics

1 answer:

diamong [38]3 years ago

4 0

2x+2=-52
2x=-54
x=-27
That is the simple formula for it.

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A DVD player that regularly sells for $325 is marked down to $225.75. What is the discount rate?

77julia77 [94]

The answer is 70% off

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3 years ago

Express in simplest radical form.<br> \frac{\sqrt{96}}{2}

Gelneren [198K]

Answer:

$\frac{ \sqrt{96} }{2} = \frac{ \sqrt{16 \times 6} }{2} = \frac{4\sqrt{6} }{2} = \boxed{2 \sqrt{6}}\\$

<h3><em><u>2√6</u></em> is the right answer.</h3>

8 0

3 years ago

Pls help (kinda easy)

3241004551 [841]

Answer:

$f(x)=(2x+1)(2x-1)$ .

Step-by-step explanation:

We want to convert the function into the form that let's us easily find the x-intercept, and it would be for the form $(ax+b)(cx+d)$ because then we can find the x-intercept in the following manner:

$(ax+b)(cx+d)=0$

$x=-b/a$

$x=-d/c$

We factor our function $f(x)=4x^2-1$ and get

$\boxed{f(x)=(2x+1)(2x-1)}$

Now this form let's us easily find the x-intercepts:

$x=-1/2$

$x=1/2$

and so we pick the second choice: f(x)=(2x+1)(2x-1).

5 0

3 years ago

Read 2 more answers

Priya measured the length of lizard to be 11 cm. The actual length is 12 cm. Find the % error.

Aleksandr [31]

Answer:

8.33%

Step-by-step explanation:

Formula for percent error:

$|\frac{observed value - expected value}{expected value} | * 100%$

Using this formula, we get:

$|\frac{11-12}{12} |* 100 = \frac{100}{12} = 8.33$

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8 0

2 years ago

-36y=x^2 The directrix of the parabola is:

Aleksandr-060686 [28]

Here, the equation of parabola is: (-36y)=x^2
The standard form of parabola is:

(X-h)^2=4p(y-k).
According to given equation, vertex = (0,0) and p = -9
This a vertical parabola opening down, because p = -9 here.
Therefore ditectrix will be y= -9

6 0

3 years ago