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GaryK [48]
2 years ago
11

rachel has a toy shaped like a triangular pyramid in which the base and the lateral faces are congruent equilateral triangles.

Mathematics
1 answer:
Sonja [21]2 years ago
3 0

Answer:

21 in. squared

Step-by-step explanation:

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4(x-2)+2x = 10
sleet_krkn [62]

Answer:

x = 3

Step-by-step explanation:

Given:

4(x-2)+2x=10

Step 1: 4x-8+2x=10

Step 2:4x+2x-8=10

Step 3: 4x+2x-8+8=10+8

Now Solving for next steps we get

Step 4: 6x=18

dividing both side by 6 we get

Step 5:\frac{6x}{6} =\frac{18}{6}

And So the Final Answer is:

x = 3

8 0
3 years ago
Que es un prisma rectangular y que es un prisma triangular??Plisa es para ahorita en una hora
Radda [10]

Answer:

un prisma rectangular es una forma 3D con 6 caras rectangulares listo

8 0
2 years ago
I need to correct my math problem
raketka [301]
From 4 to 10, it is enlarge by 2.5 times
from 6 to 15, the scale factor is also 15/6=2.5
so the answer is 2.5
4 0
3 years ago
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.954 grams and a standard devia
olga_2 [115]

Let <em>X</em> be the random variable representing the amount (in grams) of nicotine contained in a randomly chosen cigarette.

P(<em>X</em> ≤ 0.37) = P((<em>X</em> - 0.954)/0.292 ≤ (0.37 - 0.954)/0.292) = P(<em>Z</em> ≤ -2)

where <em>Z</em> follows the standard normal distribution with mean 0 and standard deviation 1. (We just transform <em>X</em> to <em>Z</em> using the rule <em>Z</em> = (<em>X</em> - mean(<em>X</em>))/sd(<em>X</em>).)

Given the required precision for this probability, you should consult a calculator or appropriate <em>z</em>-score table. You would find that

P(<em>Z</em> ≤ -2) ≈ 0.0228

You can also estimate this probabilty using the empirical or 68-95-99.7 rule, which says that approximately 95% of any normal distribution lies within 2 standard deviations of the mean. This is to say,

P(-2 ≤ <em>Z</em> ≤ 2) ≈ 0.95

which means

P(<em>Z</em> ≤ -2 or <em>Z</em> ≥ 2) ≈ 1 - 0.95 = 0.05

The normal distribution is symmetric, so this means

P(<em>Z</em> ≤ -2) ≈ 1/2 × 0.05 = 0.025

which is indeed pretty close to what we found earlier.

4 0
3 years ago
What can you infer about the population from each data set represented below?
-BARSIC- [3]
The population seems like a young age group.
8 0
3 years ago
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