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3 years ago

Y= -5 + 2x Is it positive or negative

Mathematics

1 answer:

frez [133]3 years ago

8 0

Slope is positive with a y intercept at (0,-5) hope this helps

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Solve the following quadratic by

Ainat [17]

Answer:

{x = -1 + √13 , x = -1 - √13}

Step-by-step explanation:

<u><em>Completing the square</em></u>:

f(x) = x² + 2x - 12

= x² + 2x + 1 - 1 - 12

= (x² + 2x + 1) - 1 - 12

= (x + 1)² - 13

<u><em>Solving</em></u>:

f(x) = 0

⇔ (x + 1)² - 13 = 0

⇔ (x + 1)² = 13

⇔ x + 1 = √13 or x + 1 = -√13

⇔ x = -1 + √13 or x = -1 - √13

4 0

2 years ago

The mean number of hours of part-time work per week for a sample of 317 teenagers is 29. If the margin of error for the populati

Shtirlitz [24]

Answer:

The degrees of freedom are given by:

$df=n-1=317-1=316$

And replaicing we got:

$29-2.1=26.9$

$29+2.1=31.1$

The 95% confidence interval would be between 26.9 and 31.1

Step-by-step explanation:

Information given

$\bar X= 29$ represent the sample mean

$\mu$ population mean

s represent the sample standard deviation

$ME= 2.1$ represent the margin of error

n represent the sample size

Solution

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

And this formula is equivalent to:

$\bar X \pm ME[/te]xThe degrees of freedom are given by:[tex]df=n-1=317-1=316$

And replaicing we got:

$29-2.1=26.9$

$29+2.1=31.1$

The 95% confidence interval would be between 26.9 and 31.1

7 0

4 years ago

Scenario: A new Swimming pool is opening up this summer in the Bronx. Students that are 13 - 18 years old can use the pool, gym

MA_775_DIABLO [31]

The answer to your question is 15(12)+40=?
15 being the per month fee, 12 being all 12 months, and 40 being the sign up fee. You can also put 15x12+40=?

3 0

3 years ago

If a wheel has a diameter of 15 centimeters what is the area of the wheel nearest centimeter

maw [93]

Answer:

Step-by-step explanation:

A diameter is two times longer than a radius. Therefore, if the diameter

d = 15cm, then the radius r = (15cm) : 2 = 7.5cm.

The formula of an area of a circle:

$A=\pi r^2$

Substitute:

$A=\pi(7.5)^2=56.25\pi\ cm^2$

$\pi\approx3.14$

Then

$A\approx(56.25)(3.14)\approx177\ cm^2$

4 0

3 years ago

X+k=w-v, for x solve each equation for the indicated value

creativ13 [48]

X + k = w - v.....subtract k from both sides
x = w - v - k <===

7 0

3 years ago