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Verdich [7]
2 years ago
9

A number is chosen uniformly at random from among the positive integers less than $10^8$. Given that the sum of the digits of th

e number is 9, what is the probability that the number is prime
Mathematics
1 answer:
Reil [10]2 years ago
3 0

Answer:

 

If the sum of the digits of a number is divisible by 9, then that number is divisible by 9. An..... sorry if this does not help :(

Step-by-step explanation:

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An arithmetic sequence is given below.
Mashcka [7]
Given that a_1=24 and a_2=17, if a_n is an arithmetic sequence, then the common difference between successive terms is d=a_2-a_1=17-24=-7.

You then have

a_2=a_1+d
\implies a_3=a_2+d=a_1+2d
\implies a_4=a_3+d=a_1+3d
\implies \cdots\implies a_n=a_{n-1}+d=\cdots=a_1+(n-1)d

So the explicit formula for the nth term is

a_n=24-7(n-1)
3 0
3 years ago
Between which two ordered pairs does the graph of f(x) = 1/2x2 + x – 9 cross the negative x-axis? (–6, 0) and (–5, 0) (–4, 0) an
lbvjy [14]

Answer:

Between (-6,0) and (-5,0).

Step-by-step explanation:

When it crosses the x axis, it's an x-intercept. To find the x-intercept, set y (aka f(x)) to zero. The solutions to the equation are approximately 3.36 and - 5.36. Since you're finding the negative x-intercept, you only need the negative solution - 5.36. This is in between (-6,0) and (-5,0).

3 0
3 years ago
(x+40)° what is x? plssss help meee thank you !!
SVEN [57.7K]

Answer:

I got 103˚ because I put (x+40)˚ into the calculator

5 0
3 years ago
If AGHJ - ALMK, with a scale factor of 5:6, find the perimeter of AGHJ.
Sergeeva-Olga [200]

Answer:

I am pretty sure the answer is 10: 12 have a great day.

Step-by-step explanation:

7 0
3 years ago
My bed is 3 inches by 2 2/3 inches by 1/3 inches, what is the volue of my bed.
Romashka-Z-Leto [24]

Answer:

2.6

Step-by-step explanation:

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3 years ago
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