All you have to do is plug in the given values for a and b.
0.9a - 1.5b = ?
a = 15
b = 3
0.9 (15) - 1.5 (3)
= 13.5 - 4.5
= 9
Note:
•Integers are whole numbers.
For ex: 1, 2, 3, 4...
•Decimals have a period in between 2 numbers
For ex: 0.1, 0.2, 0.3
Sometimes when it’s concerning significant digits then decimals could also be
1.0, 2.0, 3.0 ... I wouldn’t worry about this right now until you get into higher years
The answer is: 1&9 + 11 = 30
Why?
Well, there is actually no real solution to this problem, since this question is asking us to add up 3 numbers so that the sum is 30.
That is impossible. Adding three odd numbers can only result in another odd number. An odd number is just an even number + 1. So adding three odd numbers is simply adding 3 even numbers + 3 1s. 3 even numbers would equal an even number, + 3 would turn it into an odd number.
The question is asking us to add up three numbers from a list, which only includes odd numbers, so that the sum is 30, an even number, therefore there is no possible solution.
A loophole to this question is to 'combine' 2 numbers from the list, in this case, 1 and 9, and add them up with another number, 11. 19 + 11 = 30. Three numbers were used and they were from the list provided.
Using this method, here are all possible solutions:
1&5 + 15
1&7 + 13
1&9 + 11
15 + 1&5
13 + 1&7
11 + 1&9
4x -3y=-3
-4x -4x
-3y=-4x-3
Then divide by -3
Answer
Y=4/3x+1
Answer: exactly one solution
Explanation: first we have to solve it. so in 2 + 6x = 3x + 3 we have to subtract 2 from both sides and we get 6x = 3x + 1. then, we subtract 3x from both sides and we get 3x = 1. we divide both sides by 3 and get x = 1/3, which is the only solution.
hope this helped!
% change = 100x (final-initial)
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Initial
