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Makovka662 [10]
2 years ago
7

Melanie needs 12 lb of metal with 59% metal. If Melanie combines one metal with 25% silver and another 68% metal, how much of ea

ch metal does she need.
Mathematics
1 answer:
ruslelena [56]2 years ago
7 0

Answer:

c

Step-by-step explanation:

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The amount people whopay for cable service varies quite a bit, but the mean
Stells [14]

Answer:

$142 ; 0.749 ; Normal ; 0.090938

Step-by-step explanation:

Mean and standard deviation :

The mean of the distribution x = $142, because the sample size is sufficiently large, the distribution will be approximately normal (central limit theorem).

Standard deviation of distribution : σ/ sqrt(n)

= 29 / sqrt(1500)

= 0.749

B.)

Shape of sampling distribution of X.

The shape of the sampling distribution will be approximately normal due to the large sample size used. This is according to the central limit theorem whereby distribution of sample converges to normal with increasing sample size. Mean ~ N(142, 0.749²)

C.)

P(X > 143)

Using the relation :

Z = (x - mean) / standard error

Z = 143 - 142) / 0.7489

Z = 1.335

P(Z > 1.335) :

Using the Z probability calculator :

P(Z > 1.335) = 0.090938

7 0
3 years ago
HELP!!!!!!!!!!!!! Please
Arturiano [62]

Probability helps us to know the chances of an event occurring. There are six possible outcomes.

<h3>What is Probability?</h3>

Probability helps us to know the chances of an event occurring.

\rm Probability=\dfrac{Desired\ Outcomes}{Total\ Number\ of\ outcomes\ possible}

A.) The outcomes that are possible from the first spinner is 1, 2, and 3, while the outcomes possible from the second spinner are 2, Red and blue.

All the possible outcomes from this two spinner are,

(B,1), (B,2), (B,3), (R,1), (R,2), and (R,3).

Hence, there are six possible outcomes.

B.) The letters that can be used are A and B. The numbers that can be used are 1, 2, 3, and 4.

All the possible out comes are,

(B,1), (B,2), (B,3)(B,4), (A,1), (A,2), (A,3), and (A,4).

Learn more about Probability:

brainly.com/question/795909

#SPJ1

3 0
2 years ago
4+8÷2-2×3 what would we do first a 4+8 b8÷2 c2-2 d2×3​
murzikaleks [220]

Answer:

multiplication, so d, 2 x 3

Step-by-step explanation:

remember... PEMDAS!!

3 0
2 years ago
Custumers of a phone company can choose between two service plans for long distance calls. The first plan has a $9 monthly fee a
saul85 [17]
The answer is 350.
<em>
m= minutes</em>

Plan 1:  9+0.13<em>m</em>
Plan 2:  23+0.09<em>m</em>

9+0.13<em>m</em> = 23+0.09<em>m</em>
-9               -9
0.13<em>m</em> = 14+0.09<em>m</em>
-0.09<em>m</em>        -0.09<em>m</em>
0.04<em>m</em>= 14
14÷0.04= 350
<em>m</em>= 350
3 0
3 years ago
Read 2 more answers
If the temperature is 45 degrees and it decreases by 15 degrees, what is the final temperature? I​
Hoochie [10]

Answer:

30

Step-by-step explanation:

45-15

7 0
2 years ago
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