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alexandr402 [8]
3 years ago
6

I need to prove the following statement: a number is even if and only if its last digit is even.

Mathematics
2 answers:
Tanzania [10]3 years ago
6 0
It is basically like 82 84 76 94
____ [38]3 years ago
6 0
Errr, im not sure but i think its true. 34 is even 21 isnt so i think its true
You might be interested in
(someone help)
madam [21]

Answer:

600 and 3

Step-by-step explanation:

8 0
2 years ago
A system for tracking ships indicated that a ship lies on a hyperbolic path described by 5x2 - y2 = 20. the process is repeated
malfutka [58]
Answer:
The ship is located at (3,5)

Explanation:
In the first test, the equation of the position was:
5x² - y² = 20 ...........> equation I
In the second test, the equation of the position was:
y² - 2x² = 7 ..............> equation II
This equation can be rewritten as:
y² = 2x² + 7 ............> equation III

Since the ship did not move in the duration between the two tests, therefore, the position of the ship is the same in the two tests which means that:
equation I = equation II

To get the position of the ship, we will simply need to solve equation I and equation II simultaneously and get their solution.

Substitute with equation III in equation I to solve for x as follows:
5x²-y² = 20
5x² - (2x²+7) = 20
5x² - 2y² - 7 = 20
3x² = 27
x² = 9
x = <span>± </span>√9

We are given that the ship lies in the first quadrant. This means that both its x and y coordinates are positive. This means that:
x = √9 = 3

Substitute with x in equation III to get y as follows:
y² = 2x² + 7
y² = 2(3)² + 7
y = 18 + 7
y = 25
y = +√25
y = 5

Based on the above, the position of the ship is (3,5).

Hope this helps :)
7 0
3 years ago
4 times a number is greater than -48.what are the possible values for the number ?
Keith_Richards [23]

The answer might be - 12

4 x -12 = 48

7 0
3 years ago
HELP PLEASE! Will give out brainliest
charle [14.2K]

Answer:

i would say b but not sure

Step-by-step explanation:

hope this helps let me know if i got it wrong

4 0
3 years ago
PLEASE HELP WILL GIVE BRAINLIEST
Neko [114]
The answer is 3 4/5 I believe
7 0
2 years ago
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