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3 years ago

Need Help!!

Mathematics

2 answers:

ratelena [41]3 years ago

7 0

8 packs of hot dogs and 6 packs of rolls. 8x6=48.

Valentin [98]3 years ago

4 0

Answer:

You will need to buy 4 packs of hot dogs and 3 packs of buns

Step-by-step explanation:

4 times 6 is 24

3 times 8 is 24

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A daycare charges a base fee of $3 plus 0.5 dollars per minute for away after closing time pick up Alvin how to pay 10.50 lowers

Mariulka [41]

Answer:

The nursery has a fixed rate and another variable.

The fixed is a total of 3 dollars. The variable changes depending on the delay time when picking up a child.

In this case the child is Albin, who presents the following equation:

10.50 = 0.50 * a + 3

Therefore, it would be the minutes for late pickup of Albin.

3 0

3 years ago

2×-6=12

Svet_ta [14]

Answer:

2 multiply by six is 12

Step-by-step explanation:

this answer is not correct

the answer would be -12 as the biggest no. is 6 and it contains - sign

hope it helps you pls mark me as brainlest

if not possible the just thank and vote

7 0

4 years ago

Please help me simplify the expression and please show work!!! <3

gizmo_the_mogwai [7]

Step-by-step explanation:

$\frac{x + 4}{3 {x}^{2} - 12x - 96} = \frac{x + 4}{3( {x}^{2} - 4x - 32) } = \frac{x + 4}{3(x - 8)(x + 4)}$

$= \frac{1}{3(x - 8)} = \frac{1}{3x - 24}$

8 0

3 years ago

Sorry if this is wrong but I got 11/24

anyanavicka [17]

Answer:

??? what

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Scores on the SAT Mathematics test are believed to be normally distributed. The scores of a simple random sample of five student

AysviL [449]

Answer:

The mean calculated for this case is $\bar X=584$

And the 95% confidence interval is given by:

$584-2.776\frac{86.776}{\sqrt{5}}=476.271$

$584+2.776\frac{86.776}{\sqrt{5}}=691.729$

So on this case the 95% confidence interval would be given by (476.271;691.729)

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

Solution to the problem

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

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

In order to calculate the mean and the sample deviation we can use the following formulas:

$\bar X= \sum_{i=1}^n \frac{x_i}{n}$ (2)

$s=\sqrt{\frac{\sum_{i=1}^n (x_i-\bar X)}{n-1}}$ (3)

The mean calculated for this case is $\bar X=584$

The sample deviation calculated $s=86.776$

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=5-1=4$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a tabel to find the critical value. The excel command would be: "=-T.INV(0.025,4)".And we see that $t_{\alpha/2}=2.776$

Now we have everything in order to replace into formula (1):

$584-2.776\frac{86.776}{\sqrt{5}}=476.271$

$584+2.776\frac{86.776}{\sqrt{5}}=691.729$

So on this case the 95% confidence interval would be given by (476.271;691.729)

3 0

3 years ago