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topjm [15]
3 years ago
8

When positive integer a, which has n digits, is multiplied by (n 2), the product is a number with (n 1) digits, all of whose dig

its are (n 1). how many instances of a exist?
Mathematics
1 answer:
ahrayia [7]3 years ago
6 0
Instead use WolframAlpha.com for math questions  I would paste the answer but a cretinous fop has "disabled" that feature by javascript -- which is trivial to circumvent but I won't bother with the time.
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Solve the equation for all values of x in simplest form:<br> (x - 2)2 = 49
marin [14]
2x-4=49
2x=54
x is equal to 27
3 0
3 years ago
2 planes fly in opposite directions. One travels 475 mi/h and the other 525 mi/h . How long will it take before they are 6,000 m
pychu [463]
The speed at which they are moving apart = 475 + 525 = 1000 mi/h

Time  = distance / speed
         = 6000 / 1000  = 6 hours

The answer is 6 hours.



8 0
2 years ago
Help. Math is the worstttt
Vlada [557]

Answer:

I agree, also i think the answer is 15 :)

Step-by-step explanation:

4 0
3 years ago
If A= (7,9) and B= (3,12) what is the length of AB?
MissTica
The length can be found using the Pythagorean Theorem...

c^2=a^2+b^2 and in this case:

d^2=(dx^2)+(dy^2)

d^2=(3-7)^2+(12-9)^2

d^2=-4^2+3^2

d^2=16+9

d^2=25

d=5 

So the length of AB=5 units.
8 0
3 years ago
Read 2 more answers
In a certain Algebra 2 class of 25 students, 13 of them play basketball and 11 of them play baseball. There are 4 students who p
Flauer [41]

Answer:

\frac{4}{5}

Step-by-step explanation:

Given: There are 2 classes of 25 students.

            13 play basketball

            11 play baseball.

            4 play neither of sports.

Lets assume basketball as "a" and baseball as "b".

We know, probablity dependent formula; P(a∪b)= P(a)+P(b)-p(a∩b)

As given total number of student is 25

Now, subtituting the values in the formula.

⇒P(a∪b)= \frac{13}{25} +\frac{11}{25} -\frac{4}{25}

taking LCD as 25 to solve.

⇒P(a∪b)= \frac{13\times 1+11\times 1-4\times 1}{25} = \frac{20}{25}

∴ P(a∪b)= \frac{4}{5}

Hence, the probability that a student chosen randomly from the class plays both basketball and baseball is \frac{4}{5}.

6 0
3 years ago
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