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Alex Ar [27]
3 years ago
10

If you pick an integer between 1 and 1,000, what is the probability that it is either divisible by 7 or even (or both?

Mathematics
2 answers:
astra-53 [7]3 years ago
6 0
The answer to this question is 64%

cupoosta [38]3 years ago
5 0
There are 500 even numbers 1 - 1000.
7 can go into 1000 about 143 times.
500 + 143 = 643.
Make 1000 = 100 (to make it percentage).
Divide 643 by 10 (because you divided 1000 by 10)
all to equal ABOUT 64.3%
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Please help with this math problem
zimovet [89]

x=2+½*\sqrt{10}

or

x=2-½*\sqrt{10}

Answer:

Solution given:

y=2x²-5x+6.....[1]

y=3x+3.........….[2]

solving equation 1&2

2x²-5x+6=3x+3

2x²-5x-3x+6-3=0

2x²-8x+3=0

comparing above equation with ax²+bx+c=0 we get

a=2

b=-8

c=3

by using quadratic equation

x=\frac{+8±\sqrt{(-8)²-4*2*3}}{2*2}

x=\frac{+8±2\sqrt{10}}{4}

taking positive

x=\frac{+8+2\sqrt{10}}{4}

x=2+½*\sqrt{10}

taking negative

x=2-½*\sqrt{10}

3 0
3 years ago
Given that (3,9) is on the graph of f(x), find the corresponding point for the function. F(x)+1
Goryan [66]

Answer:

(4,10)

Step-by-step explanation:

Input: (3,9)

(3+1, 9+1)

Output: (4,10)

8 0
3 years ago
Read 2 more answers
Which statement is true?
Veronika [31]
B. is true. 15·(–5) > 23·(–12).
15·(-5)=-75.
23·(-12)=-276.

-75 > -276
7 0
3 years ago
Read 2 more answers
16. write an inequality for each graph
Harrizon [31]

Answer:

Question 16

(a) x < 1 : the values of x are smaller than than 1 (e.g. possible values are 0, -1, -2, etc) and since the circle is not shaded it means that 1 isn't a possible value of x

(b) x \geq -2 : the circle is filled therefore -2 is included in the answer

Question 17

(a) unfilled dot above -2 and arrow pointing to the left

(b) shaded circle above 4 with and arrow pointing to the right →

7 0
3 years ago
A sociologist develops a test to measure attitudes towards public transportation, and 27 randomly selected subjects are given th
taurus [48]

Answer:

The margin of error for the 95% confidence interval for the mean score of all such subjects is of 8.45.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used 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 = 27 - 1 = 26

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 26 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.0518

The margin of error is:

M = T\frac{s}{\sqrt{n}}

In which s is the standard deviation of the sample and n is the size of the sample.

In this question:

n = 27, s = 21.4. So

M = 2.0518\frac{21.4}{\sqrt{27}}

M = 8.45

The margin of error for the 95% confidence interval for the mean score of all such subjects is of 8.45.

5 0
3 years ago
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