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3 years ago

Give the unit rate for the better deal. $81 25 gal or $62.05 20 gal

Mathematics

1 answer:

Elan Coil [88]3 years ago

6 0

Answer:

$62.05 for 20 gallons

Sorry if I didn't get it correct. I don't really understand how you worded your question. <3

Step-by-step explanation:

$81 for 25 gallons =

81/25 = $3.24 for 1 gallon

$62.05 for 20 gallons =

62.05 / 20 = $3.10 for 1 gallon

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How do i find the area of this composite figure?

diamong [38]

To find the area of a composite figure, separate the figure into simpler shapes whose area can be found. Then add the areas together. Be sure than none of the simpler figures have overlapping areas

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3 years ago

Read 2 more answers

PLZ ANSWER: A sandwich store charges a $10 delivery fee and $4.50 for each sandwich which is the total cost language and deliver

Irina-Kira [14]

Answer

$37

Explanation

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hope this helps!!

6 0

3 years ago

The triangle below is an equilateral triangle. Find y.<br> 10<br> y+3

Colt1911 [192]

Answer:

y = 7

Step-by-step explanation:

An equilateral triangle has all its sides to be equal..

so.

10 = x

10 = y + 3

y = 10 - 3

y = 7

6 0

3 years ago

Use technology or a z-score table to answer the question.

Alik [6]

Answer:

The second choice: Approximately $65.2\%$ of the pretzel bags here will contain between 225 and 245 pretzels.

Step-by-step explanation:

This explanation uses a z-score table where each $z$ entry has two decimal places.

Let $\mu$ represent the mean of a normal distribution of variable $X$ . Let $\sigma$ be the standard deviation of the distribution. The z-score for the observation $x$ would be:

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

In this question,

$\mu = 240$ .
$\sigma = 9.3$ .

Calculate the z-score for $x_1 = 225$ and $x_2 = 245$ . Keep in mind that each entry in the z-score table here has two decimal places. Hence, round the results below so that each contains at least two decimal places.

$\begin{aligned} z_1 &= \frac{x_1 - \mu}{\sigma} \\ &= \frac{225 - 240}{9.3} \approx -1.61\end{aligned}$ .

$\begin{aligned} z_2 &= \frac{x_2 - \mu}{\sigma} \\ &= \frac{245 - 240}{9.3} \approx 0.54\end{aligned}$ .

The question is asking for the probability $P(225 \le X \le 245)$ (where $X$ is between two values.) In this case, that's the same as $P(-1.61 \le Z \le 0.54)$ .

Keep in mind that the probabilities on many z-table correspond to probability of $P(Z \le z)$ (where $Z$ is no greater than one value.) Therefore, apply the identity $P(z_1 \le Z \le z_2) = P(Z \le z_2) - P(Z \le z_1)$ to rewrite $P(-1.61 \le Z \le 0.54)$ as the difference between two probabilities:

$P(-1.61 \le Z \le 0.54) = P(Z \le 0.54) - P(Z \le -1.61)$ .

Look up the z-table for $P(Z \le 0.54)$ and $P(Z \le -1.61)$ :

$P(Z \le 0.54)\approx 0.70540$ .
$P(Z \le -1.61) \approx 0.05370$ .

$\begin{aligned}& P(225 \le X \le 245) \\ &= P\left(\frac{225 - 240}{9.3} \le Z \le \frac{245 - 240}{9.3}\right)\\&\approx P(-1.61 \le Z \le 0.54) \\ &= P(Z \le 0.54) - P(Z \le -1.61)\\ &\approx 0.70540 - 0.05370 \\& \approx 0.65.2 \\ &= 65.2\% \end{aligned}$ .

3 0

3 years ago

HELP

Monica [59]

alligators:

x = total number of alligators

n = number of years

x=20x1.25^n

crocodiles:

y = total number of crocodiles

n = number of years

y=25+10n

4 0

3 years ago