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Pavel [41]
3 years ago
7

How do I model and solve algebriac expressions?

Mathematics
1 answer:
AveGali [126]3 years ago
6 0
1) Identify what your variables and constants are.

2) Examine the relationship between them (i.e. positive or negative).

3) The variables always go with "x", for example: Timmy works in an electronic store and makes $60 every day (constant) and additionally, he makes $10 for every computer he sells (variable). Notice the word "every", this hints at what your variable is. So, in this example your equation would look like this: y = 10x + 60

Hope that helps!
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125
Marina CMI [18]

Answer:

2m

Step-by-step explanation:

2250 \div 25 = 90

90 \div 45 = 2

7 0
3 years ago
Determine whether the statement below is true or false. <br> 7C5 = 7C2
tia_tia [17]

True

Step-by-step explanation:

I double checked it I'm positive

4 0
3 years ago
Read 2 more answers
Tyler orders a meal that costs $15.
Papessa [141]

Answer:

There would be $ 0.99 sales tax on the meal.

Step-by-step explanation:

Given,

The cost of the meal ordered by him = $15,

sales tax rate percentage = 6.6%,

Thus, the amount of the sales tax = 6.6% of the cost of the meal

= 6.6% of 15

3 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 lol lol :))))
Papessa [141]

Answer:

is this required answer

Step-by-step explanation:

AB=3x-2

=3*8-2

=22

7 0
2 years ago
Read 2 more answers
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