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kotykmax [81]
2 years ago
14

Simplify the expression using order of operations. 15−7×2+23

Mathematics
2 answers:
ZanzabumX [31]2 years ago
8 0

Answer: 24

Step-by-step explanation:

astra-53 [7]2 years ago
8 0

Answer:

24

Step-by-step explanation:

Multiplication first:

15 - 14 + 23

Addition and Subtraction:

15 - 14 + 23 = 24

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lana66690 [7]
Third and last. 



first, second and forth are wrong
4 0
3 years ago
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An author argued that more basketball players have birthdates in the months immediately following July​ 31, because that was the
Lady_Fox [76]

Answer:

There is sufficient evidence to warrant rejection of the claim that professional basketball players are born in different months with the same​ frequency.

Step-by-step explanation:

In this case we need to test whether there is sufficient evidence to warrant rejection of the claim that professional basketball players are born in different months with the same​ frequency.

A Chi-square test for goodness of fit will be used in this case.

The hypothesis can be defined as:

<em>H₀</em>: The observed frequencies are same as the expected frequencies.

<em>Hₐ</em>: The observed frequencies are not same as the expected frequencies.

The test statistic is given as follows:

 \chi^{2}=\sum{\frac{(O-E)^{2}}{E}}

The values are computed in the table.

The test statistic value is \chi^{2}=128.12.

The degrees of freedom of the test is:

n - 1 = 12 - 1 = 11

Compute the <em>p</em>-value of the test as follows:

p-value < 0.00001

*Use a Chi-square table.

p-value < 0.00001 < α = 0.05.

So, the null hypothesis will be rejected at any significance level.

Thus, there is sufficient evidence to warrant rejection of the claim that professional basketball players are born in different months with the same​ frequency.

6 0
3 years ago
Olve the system of equations.
stepladder [879]
The system:
y = 3 x - 7
15 x - 5 y = 14
---------------------
Using the substitution method:
15 x - 5 · ( 3 x - 7 ) = 14
15 x - 15 x + 35 = 14
0 · x = 14 - 35
0 · x = - 21
x , y ∈ ∅
Answer:
D ) There is no solution.
3 0
2 years ago
Dhruv is at a car dealership. He is going to randomly select a vehicle to test drive. There are
andrew-mc [135]

Answer:

P(compact cars) = 4/25

Step-by-step explanation:

We know that there are 13 trucks, 8 vans, and 4 compact cars.

Let P denotes the probability of an event

Now we are asked to find the probability of compact cars

Number of favorable events = number of compact cars = 4

total number of outcomes = 13+8+4 = 25

hence, P(compact cars) = number of favorable events/total outcomes

                                       =4/25

8 0
1 year ago
What is the diameter of a circle with a circumference of 30 pi inches
Olenka [21]
Circumference = πD 

30π = πD 

D = 30 inches

Answer: 30 inches
6 0
3 years ago
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