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marysya [2.9K]
2 years ago
15

Solve the system of equations 15x -2y = 4 20x - 3y = 1

Mathematics
1 answer:
makkiz [27]2 years ago
3 0

Answer: try internet

Step-by-step explanation:

sorry

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Given the following three arithmetic sequences : 1, 3, ... and 1, 4, ... and 1, 5, ... A number is randomly selected from 1 to 1
ladessa [460]

Answer:

  0.333

Step-by-step explanation:

The first sequence starts at 1 and has a common difference of 2. It will include every odd number in the range.

__

The second sequence starts at 1 and has a common difference of 3. It will include odd numbers and the even numbers 4, 10, 16, .... That is, all even numbers of the form 6n -2 will be included. The last one corresponds to the largest value of n such that ...

  6n -2 ≤ 1000

  6n ≤ 1002

  n ≤ 167

That is, 167 even numbers will also be excluded.

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The third sequence starts at 1 and has a common difference of 4. Every number in this sequence is also a number in the first sequence.

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So the numbers in these sequences include all 500 odd numbers and 167 even numbers, for a total of 667 numbers. The probability that a randomly chosen number is not in one of these sequences is ...

  (1000 -667)/(1000) = 333/1000 = 0.333 . . . . p(not a sequence term)

8 0
3 years ago
How would you do this problem
Drupady [299]

It would be helpful to draw out a diagram but I'll explain in words.

We start at 0, ground level.

Then up a 100 metre hill, so now we are at 100m.

It plunges down 72, so we take away 72 to get 28m.

Then it takes them back up 48m, so we add 48 to get 76m.

That means that they are 76m above from where they started, ground level.

Hope I helped!

6 0
3 years ago
If car can travel 50 miles in 55 minutes, how long will it take to travel 75 miles ?
mrs_skeptik [129]
First of all, if you are traveling more, then you will have to take more time to get there. So since the answer A is less than the original number 50 you can rule that choice out. Now to solve, you will put 50 over 55 such as this 50/55. This represents miles/minutes. So next you will put 75/x since we are trying to solve for x (minutes). Now our problem looks like this 50/55 times 75/x. To solve the answer you will need to cross multiply. You will multiply 75 and 55 together to get 4,125. (This will be your numerator, or top number) Next you will multiply 50 and x, this gives you 50. (This will be your denominator, or bottom number. Now you have 4,125/50. Divide your two numbers and you get 82.5! The answer is D. 82.5! Hope I helped!
7 0
3 years ago
# 14 Q. Write a congruence
MrRissso [65]
The first is the correct
Δ ZYB ≈ Δ OWR by SSS
because:
                ZB = OR = 5
                ZY = OW = 3
                YB = WR = 5.5
4 0
3 years ago
Read 2 more answers
The slope of a line is -5. What is the rise if the run is 4?
MA_775_DIABLO [31]

Answer:

-1.25

Step-by-step explanation:

-5=X/4

-5(4)=-1.25

6 0
3 years ago
Read 2 more answers
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