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alexandr1967 [171]
3 years ago
12

A student wants to report on the number of books her friends read each week. The collected data are below:

Mathematics
1 answer:
makvit [3.9K]3 years ago
5 0
Mean, or average.

The mean is 5.625
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Sonora currently has an account balance of $1,822.07. Her initial deposit on the account was $781 and it earned 4.3% simple inte
Tanya [424]

Answer: 31

Step-By-Step Explanation:

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3 years ago
For the function f(x) = -3x + 2, what is the local
jolli1 [7]
The answer would be

F(x)=x^2-8x
4 0
3 years ago
At a local college 100 students were asked about their major fields of study. The results are shown below. What is the probabili
Oksanka [162]

Answer:

7/10

Step-by-step explanation:

To find the probability that a student is a liberal arts or female, we have to add together all of the people who were female or liberal arts majors in the study. If we add those together, (15 + 18 + 17 + 20) we get 70. 70/100 can be simplified to 7/10.

5 0
2 years ago
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The coordinate plane below represents a city. Points A through F are schools in the city.
Usimov [2.4K]
Part A. The technique on how to find the equation that only applies to point D and E, is to create a line or curve that only includes two of these points. In this case, I created a random parabola that isolates points C and F from the rest of the points. First, we have to find the equation of the parabola through its general forms:

(x - h)² = +/-4a(y-k)      or    (y - k)² = +/-4a(x - h)

For parabolas drawn like that in the picture, the general form is (x - h)² = +4a(y-k), where the vertex is (h,k) and a is the distance from the vertex to the focus. From the picture, the vertex is at (0,3). Then, we use point D(-2,4) to determine a:

(-2 - 0)² = +4a(4 - 3)
4a = 4

So, the equation of the parabola is:

x² = 4(y - 3)
x² = 4y - 12

Part B. Point D was already verified above. Now for point E(2,4)
x² = 4y - 12
2² ? 4(4) - 12
4 ? 4
4 = 4

Part C. For y < 7x − 4, ignore the equality symbol first and graph the line. Assign random values of x, then you get corresponding values of y. Plot them as shown in the second picture. The line is shown in red. Next, test the equation by choosing a random point. Let's choose the purple point at (4,3).

3 ? 7(4) − 4
3 ? 24
3 < 24

Thus, it applies to the purple point, and all the other areas to that area. The shaded region are all solutions of the inequality. So, Erica is only interested in points E, C and F. 

5 0
3 years ago
If 9 is subtracted from two thirds of a number , the result is 7. find the number.
ankoles [38]
So what you do is (2/3)x-9=7. Add 9 to both sides (2/3)x=16. Multiply by reciprocal on both sides 16 x (3/2). 16 x 3 = 48. 48/2=24
7 0
3 years ago
Read 2 more answers
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