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rusak2 [61]
3 years ago
7

Please simplify 10{N + 3).

Mathematics
1 answer:
lana [24]3 years ago
6 0

Answer:

Step-by-step explanation:

I must assume that you meant 10(N + 3).  Let's not mix { with ).

10(N + 3) is as simple as this expression gets.  You could, however, re-write it as 10N + 30.

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I am having a conflict with my family what is 7-1×0+3÷3 = ?
ryzh [129]
Follow PEMDAS.

Parenthesis
Exponents
Multiplication & Division
Addition & Subtraction

Alright, do multiplication first, then division. Then, do subtraction then addition.

7-1*0+3/3= \\ 7-0+3/3= \\ 7 - 0 + 1= \\ 7 + 1 = 8 \\ 7-1*0+3/3 =8

Hope this helped!
6 0
3 years ago
The class treasury contained 30$ in nickels and dimes. If there were 500 coins than how many coins of each type are there?
Alenkasestr [34]
Equation 1.  N+D=500

equation 2   5N+10D=3000
This is for equation 1
N=500-d
Substitute into equations 2 and solve for D
5N+10D=3000
5(500-D)+10D=3000
2500-5D+10D=3000
5D=500
D=100
Lets go back the equation 1
N=500-D
N=500-100
N=400
there are 400 Nickles and 100 Dimes
7 0
3 years ago
Assume the population has a normal distribution. A sample of 25 randomly selected students Has a mean test score of 81.5 With a
Natasha_Volkova [10]

Answer:

The 90% confidence interval for the mean test score is between 77.29 and 85.71.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution 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 = 25 - 1 = 24

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 24 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 2.064

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.064\frac{10.2}{\sqrt{25}} = 4.21

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 81.5 - 4.21 = 77.29

The upper end of the interval is the sample mean added to M. So it is 81.5 + 4.21 = 85.71.

The 90% confidence interval for the mean test score is between 77.29 and 85.71.

6 0
3 years ago
Help please !!!!!!! Thanks in advance
Rudik [331]

Answer:

Sorry, the question doesn't make sense. But Measure of angle A is28 degrees. what are you trying to figure out for just A and C?

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Do i give in to the munchies bro
Vesna [10]

Answer:

wut thut u better tell me -_-

Step-by-step explanation:

5 0
2 years ago
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