<em><u>Option B</u></em>
The result of addition is 2y = 24
<em><u>Solution:</u></em>
Given that we have to add the equations
<em><u>Given equations are:</u></em>
5x - y = -1
-5x + 3y = 25
We have to add both equations
This is similar to adding numbers. i,e 1 + 2 = 3
<em><u>For adding variables,</u></em>
When adding or subtracting terms that have exactly the same variables, you either add or subtract the coefficients, and let the result stand with the variable.
Example: 2x + 3x = 5x
Keeping this in mind, let us add the given equations
5x - y = -1
-5x + 3y = 25
----------------------------
0 + 2y = -1 + 25
[ 5x and -5x cancels each other. Combine -y and 3y which gives 2y]
2y = 24
Thus Option B is correct
Answer:
( 5 , 2)
Step-by-step explanation:
The coordinates of T can be found as
[ 1 + (2/3)(7 - 1) , 4 + (2/3)(1 - 4) ] =
[ 1 + (2/3)(6) , 4 + (2/3)(-3) ] =
[ 1 + 4. 4 - 2 ] =
( 5 , 2)
B is the correct answer
In the United States we vote on people who represent us so it’s B
Answer:
2300
Step-by-step explanation:
Answer:
<u>16 ounces</u> of the 30% hydrochloric acid solution is used in order to obtain the 25% solution.
Step-by-step explanation:
Let amount of 30% ounces be 'x' and that of 15% ounces by 'y'.
Given:
Total amount on mixing both the solution = 24 oz
∴
Also, the total acid content in the resulting 25% solution is equal to the sum of the acid contents in 30% and 15% solutions.
∴
Now, plug in 'x' from equation (1) into equation (2). This gives,
ounces
Therefore, ounces
Hence, 16 ounces of the 30% hydrochloric acid solution is used in order to obtain the 25% solution