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3 years ago

At her part-time job, Shelly earns $50.00 per day, plus $5.00 for every sale that she

Mathematics

2 answers:

kogti [31]3 years ago

8 0

Answer:

Step-by-step explanation:

Shelly made 7 sales during today

She made fifty dollars then sold 7 things which gave her 35 dollars to get 85 dollars

swat323 years ago

7 0

1. Subtract 85-50=30
2. Divide 30/5=6
She made 6 sales

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A. Student GPAs: Bob’s z-score z = + 1.71 μ = 2.98 σ = 0.36 b. Weekly work hours: Sarah’s z-score z = + 1.18 μ = 21.6 σ = 7.1 c.

hjlf

Answer:

a) $x = \mu +z*\sigma$

And replacing we got:

$x= 2.98 + 1.71*0.36 = 3.5956$

b) $x = \mu +z*\sigma$

And replacing we got:

$x= 21.6 + 1.18*7.1 = 29.978$

c) $x = \mu -z*\sigma$

And replacing we got:

$x= 150 - 1.35*40= 96$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Part a

Let X the random variable of interest for this case. We define the z score with the following formula:

$z=\frac{x-\mu}{\sigma}$

And for this case we know that $z = 1.71, \mu = 2.98,\sigma = 0.36$

If we solve for x from the z score formula we got:

$x = \mu +z*\sigma$

And replacing we got:

$x= 2.98 + 1.71*0.36 = 3.5956$

Part b

Let X the random variable of interest for this case. We define the z score with the following formula:

$z=\frac{x-\mu}{\sigma}$

And for this case we know that $z = 1.18, \mu = 21.6,\sigma = 7.1$

If we solve for x from the z score formula we got:

$x = \mu +z*\sigma$

And replacing we got:

$x= 21.6 + 1.18*7.1 = 29.978$

Part c

Let X the random variable of interest for this case. We define the z score with the following formula:

$z=\frac{x-\mu}{\sigma}$

And for this case we know that $z = -1.35, \mu = 150,\sigma = 40$

If we solve for x from the z score formula we got:

$x = \mu -z*\sigma$

And replacing we got:

$x= 150 - 1.35*40= 96$

5 0

3 years ago

I'm pretty sure the answer's one, but I need an expression. I will give brainiest to whoever answers this!!!

givi [52]

Answer:

0x+1 (or just 1)

Step-by-step explanation:

if non shaded/ white tiles are negative, and shaded positive expression would look like:

2x+4 and -2x-3

when simplified 2x-2x cancels out, and 4-3=1.

what is left over is just 1.

3 0

3 years ago

Use the Rational Zero Theorem to list all possible rational zeros for the given function. f(x) = 10x^5 + 8x^4 - 15x^3 +2x^2 - 2

vagabundo [1.1K]

Given:

The function is:

$f(x)=10x^5+8x^4-15x^3+2x^2-2$

To find:

All the possible rational zeros for the given function by using the Rational Zero Theorem.

Solution:

According to the rational root theorem, all the rational roots are of the form $\dfrac{p}{q},q\neq 0$ , where p is a factor of constant term and q is a factor of leading coefficient.

We have,

$f(x)=10x^5+8x^4-15x^3+2x^2-2$

Here,

Constant term = -2

Leading coefficient = 10

Factors of -2 are ±1, ±2.

Factors of 10 are ±1, ±2, ±5, ±10.

Using the rational root theorem, all the possible rational roots are:

$x=\pm 1,\pm 2,\pm \dfrac{1}{2}, \pm \dfrac{1}{5},\pm \dfrac{2}{5},\pm \dfrac{1}{10}$ .

Therefore, all the possible rational roots of the given function are $\pm 1,\pm 2,\pm \dfrac{1}{2}, \pm \dfrac{1}{5},\pm \dfrac{2}{5},\pm \dfrac{1}{10}$ .

5 0

3 years ago

8x^2+32x-96<img src="https://tex.z-dn.net/?f=8x%5E%7B2%7D%20%2B36x-96" id="TexFormula1" title="8x^{2} +36x-96" alt="8x^{2} +36x-

erma4kov [3.2K]

Answer:

−19282+104−96

Step-by-step explanation:

hopefully this helps, I'm not sure I'd it is correct though

4 0

3 years ago

Find the volume of the hemisphere with a radius of 7 inches. Round your answer to the nearest tenth.

EleoNora [17]

Answer:

The formula for the volume of a sphere is:

Sphere Volume = 4/3 • π • r^3

Sphere Volume = 4/3 • π • 7^3

Sphere Volume = 4/3 • π • 343

Sphere Volume = 1,436.7550402417 cubic inches

Step-by-step explanation:

5 0

3 years ago