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eimsori [14]
3 years ago
5

A jar contains 3 pennies, 5 nickels, 4 dimes, and 6 quarters. If a coin is selected at random, what is the probability of select

ing a penny?
Mathematics
2 answers:
bagirrra123 [75]3 years ago
7 0
The probability of selecting a penny would be 1/6
klio [65]3 years ago
5 0

Answer:

Step-by-step explanation:

3 out of 18 chance

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3(2x + 5)= 4 (c-3) I know how to solve it but can someone explain it.
Nezavi [6.7K]

Answer:

3x×2c+1

Step-by-step explanation:

6x+15 =4c-12

\frac{6x + 15}{4c - 12}  =  \frac{4c - 12}{4c - 12}

\frac{6x + 15}{4c - 12}

\frac{3x  + 5}{2c - 4}

3x + 5 \div 2c - 4

3x  \times 2c + 5 - 4

3x \times 2c + 1

5 0
2 years ago
Allison has a 1/2 cup of yogurt for making fruit parfait recipe 1/8 Cup of yogurt. How many parfait can she make
Tems11 [23]

Answer:

4 parfaits

Step-by-step explanation:

Given that,

Allison has a 1/2 cup of yogurt for making fruit parfait recipe 1/8 Cup of yogurt.

We need to find how many parfait can she make.

Let she can make x parfait.

x=\dfrac{\dfrac{1}{2}}{\dfrac{1}{8}}\\\\=\dfrac{1}{2}\times \dfrac{8}{1}\\\\=4

Hence, she can make 4 parfaits.

3 0
3 years ago
K (n) = 4n – 4; Find k (8)<br> 28<br> 4<br> -32<br> -24<br> The answer
Maurinko [17]

Answer:

Step-by-step explanation:

k(8) = 4(8) - 4

     = 32 - 4

     = 28

answer is A

8 0
3 years ago
A study investigated the effectiveness of meditation training in reducing trait anxiety. The study evaluated subjects trait anxi
Setler79 [48]

Answer:

The 99% confidence interval for the population mean reduction in anxiety was (1.2, 8.6).

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 27 - 1 = 26

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 26 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.99}{2} = 0.995. So we have T = 2.7787.

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.7787\frac{6.9}{\sqrt{27}} = 3.7

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 4.9 - 3.7 = 1.2.

The upper end of the interval is the sample mean added to M. So it is 4.9 + 3.7 = 8.6.

The 99% confidence interval for the population mean reduction in anxiety was (1.2, 8.6).

6 0
2 years ago
What are the equations
I am Lyosha [343]

Answer:

(-3,4)

(-1,4)

(-3,7)

Step-by-step explanation:

(1,1) → (1-4, 1+3) → (-3,4)

(3,1) → (3-4, 1+3) → (-1,4)

(1,4) → (1-4, 4+3) → (-3,7)

8 0
3 years ago
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