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Readme [11.4K]
2 years ago
10

Write an algebraic expression for the

Mathematics
2 answers:
Vera_Pavlovna [14]2 years ago
5 0

Answer:

<h2>x+4²×3</h2>

<h2>mark me as brainliest</h2>
STALIN [3.7K]2 years ago
5 0

Answer

(x+4)^2x3

Step-by-step explanation:

so x add 4 is obviously x add 4 but since you want to square it you have to put x add 4 in brackets like this

(x+4)

you put the square symbol next to the brackets because you only want to square whats inside the brackets

(x+4)^2

and then you put times 3 so you can multiply everything by it so now its

(x+4)^2x3

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erik [133]

Answer:

The 95% confidence interval for the true average strain is between 23.94% and 28.06%.

Step-by-step explanation:

We have the standard deviation of 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 = 13 - 1 = 12

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 12 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.18

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.18\frac{3.4}{\sqrt{13}} = 2.06

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 26 - 2.06 = 23.94

The upper end of the interval is the sample mean added to M. So it is 26 + 2.06 = 28.06

The 95% confidence interval for the true average strain is between 23.94% and 28.06%.

3 0
3 years ago
What is the length of bc in the right triangle below ?
Nana76 [90]

Answer:

BC = 39

Step-by-step explanation:

<h3>a²+b² = c²</h3><h3>15²+36² = 1521</h3><h3>\sqrt{1521}</h3><h3>=39</h3>
3 0
3 years ago
Sara bought 4 pounds
Roman55 [17]

Answer:

$12.80

Step-by-step explanation:

Sara bought 4 pounds of coffee.

Each pound (lb) costs $3.20

To find the total cost, multiply the cost per pound ($3.20) with the amount of pounds Sara is going to buy (4):

4 x 3.20 = $12.80

$12.80 would be the total cost before tax.

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3 years ago
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What side is this a isosceles a scalene or equilateral
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The answer is a scalene
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3 years ago
what is an equation to represent for (Andre withdrew spending money from his checking account that initially had $982. What was
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Answer:

The Answer is w - 982 = 922 because it whatever money he took from the 982 lead to 922

Step-by-step explanation:

6 0
2 years ago
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