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PolarNik [594]
4 years ago
9

(3*x)*7Simplify the expression. Identify the property used

Mathematics
1 answer:
inessss [21]4 years ago
5 0

tis just a plain vanila multiplication


(3·x)·7 -> 21x.

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Joshua drove 90 miles on 15 gallons of gas. Find the unit rate.​
lions [1.4K]

Answer: 6 Miles

Step-by-step explanation: Its simple. Just divide 90 miles by 15 gallons.

7 0
3 years ago
Meth Barie's ice cream shop wants to decide whether to introduce a new ice cream flavor. They randomly selected 15 customers at
Marianna [84]

Answer:

Meth Barie's ice cream shop should not introduce the new ice cream flavor.

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = 4.01

Sample mean, \bar{x} = 4.4

Sample size, n = 15

Alpha, α = 0.1

Sample standard deviation, s = 1.6 minutes

First, we design the null and the alternate hypothesis

H_{0}: \mu \leq 4.01\\H_A: \mu > 4.01

We use one-tailed t test to perform this hypothesis.

Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{4.4 - 4.0}{\frac{1.6}{\sqrt{15}} } = 0.968

Option B) 0.968

Rejection region:

Now, t_{critical} \text{ at 0.10 level of significance, 9 degree of freedom } = 1.345

So the rejection region would be a value of t-statistic greater than 1.345.

Option B) t > 1.345

Conclusion:

Since,                    

t_{stat} < t_{critical}

We fail to reject the null hypothesis and accept the null hypothesis. Meth Barie's ice cream shop should not introduce the new ice cream flavor.

8 0
4 years ago
Which statement describes how the reasonable domain<br> compares to the mathematical domain?
tigry1 [53]

A statement which best describes how the reasonable domain compares to the mathematical domain is that: C. the mathematical domain includes all real numbers, while the reasonable domain includes only real numbers greater than 2.

<h3>What is a domain?</h3>

In Mathematics, a domain can be defined as the set of all real numbers for which a particular function is defined. This ultimately implies that, a domain is the set of all possible input numerical values or numbers to a function and the domain of any graph comprises all the input numerical values or numbers which are primarily shown on the x-axis.

Next, we would evaluate the function which represents the perimeter of this rectangle by substituting the value of 2 as follows:

f(w) = 6w – 8

f(2) = 6(2) – 8

f(2) = 12 – 8

f(2) = 4.

For the length of this rectangle, we have:

Length = 2w - 4

Length = 2(2) - 4

Length = 4 - 4

Length = 0

Therefore, the width of this rectangle must be real numbers that are greater than 2.

Read more on domain here: brainly.com/question/17003159

#SPJ1

Complete Question:

A rectangle has a length that is equal to 4 less than twice the width. The function for the perimeter depending on the width can be expressed with the function f(w) = 6w – 8, where w is the width of the rectangle in centimeters.

Which statement describes how the reasonable domain compares to the mathematical domain?

Both the mathematical and reasonable domains include only positive real numbers.

Both the mathematical and reasonable domains include only positive whole numbers.

The mathematical domain includes all real numbers, while the reasonable domain includes only real numbers greater than 2.

The mathematical domain includes all real numbers, while the reasonable domain includes only whole numbers greater than 2.

8 0
1 year ago
I will mark the the first person to answer correctly brainliest
ryzh [129]

Answer:

b

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Which transformation represents a reflection over the y-axis?
11111nata11111 [884]

Answer:

1

Step-by-step explanation:

over Y would make the x negative

6 0
3 years ago
Read 2 more answers
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