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3 years ago

Which situation can be modeled by the inequality 65−8x≥9?

Mathematics

2 answers:

Klio2033 [76]3 years ago

5 0

Answer:

x is less than Or equal to 7

Step-by-step explanation:

Rzqust [24]3 years ago

3 0

Answer:

You have $65 to spend on food while on a trip, but you need to save at least $9 for the train ride home. You plan to spend the rest on food that costs $8 each meal (including tax).

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Pls Help Soon as possible

guajiro [1.7K]

The first you can multiply first equation by 2, you will get 16x - 12y = - 40, then add first equation to second

16x - 12y - 16x + 7y = - 40 + 30
-5y = - 10
Y= 2;
Then put y to first equation, because it easier.
8x - 2*6=-20
8x = - 8
X= - 1

Answer is x = - 1, y = 2.

7 0

3 years ago

"How much do students pay, on average, for textbooks during the first semester in college? From a random sample of 400 students

dezoksy [38]

Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

Step-by-step explanation:

Since we have given that

Sample size = 400

Mean = $357.75

Standard deviation = $37.89

At 95% confidence level, z = 1.96

We first find the margin of error.

Margin of error is given by

$z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{37.89}{\sqrt{400}}\\\\=3.71$

95% confidence interval would be

$\bar{x}\pm \text{margin of error}\\\\=357.75\pm 3.71\\\\=(357.75-3.71,357.75+3.71)\\\\=(354.04,361.46)$

Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

7 0

4 years ago

Please help me with 5 with correct answer and try showing work if can

STALIN [3.7K]

The answer would be A. -$16.25. It's negative because that's what Paul owes his dad. You add 10.75 and 5.50 and just turn it negative.

4 0

4 years ago

Read 2 more answers

So, I undestood slope right. But, I get confused with the other points that intersect there is multiple of them. How do i look f

ivanzaharov [21]

Answer:

slope = 2

Step-by-step explanation:

Find 2 points on the line that land perfectly on the grid. I'll choose these 2 here:

(-2, -1) and (0, 3)

Rise is the change in the y value from one point to the other, and run is the change in the x. Looking at these 2 points, y went from -1 to 3. That is a <em>rise</em> of 4. The x went from -2 to 0, so that is a <em>run</em> of 2. "rise over run" means rise literally over run in a fraction like this:

$m=\frac{rise}{run}$

The more proper way to calculate slope looks like this, but it's really the same thing in the end:

$m=\frac{y2-y1}{x2-x1}$

where (x1, y1) and (x2, y2) are your 2 points.

Finally, the slope of this line is:

$m=\frac{3--1}{0--2}\\\\m=\frac{4}{2}\\\\m=2$

That's a rise of 4 over a run of 2, and that simplifies to just a slope of 2.

8 0

3 years ago

Glados works as a nurse at a county hospital in Baton Rouge. Glados

Serga [27]

Answer:

Glados makes $44.76 per hour.

Step-by-step explanation:

Given:

Total hours Glados worked this week = 38.4

Amount earned by Glados this week = $1,718.64

To find her hourly earnings for the week.

Solution:

We will use unitary method to find the unit rate.

If for 38.4 hours Galdos earned = $1,718.64

Then for 1 hour she will earn = $\frac{\$1,718.64}{38.4}=\$44.756\approx\$44.76$

Thus, Galdos' hourly earnings for the week = $44.76

7 0

3 years ago