Answer:
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Step-by-step explanation:
Answer: option c is the correct answer.
Step-by-step explanation:
The given system of equations is expressed as
5x + 2y = - 38 - - - - - - - - - - -1
6x + 10y = - 19 - - - - - - - - - - - 2
We would eliminate x by multiplying equation 1 by 6 and equation 2 by 5. It becomes
30x + 12y = - 228
30x + 50y = - 95
Subtracting, it becomes
- 38y = - 133
Dividing the left hand side and the right hand side of the equation by - 38, it becomes
y = - 133/-38 = 3.5
Substituting y = 3.5 into equation 1, it becomes
5x + 2 × 3.5 = - 38
5x + 7 = - 38
5x = - 38 - 7 = - 45
Dividing the left hand side and the right hand side of the equation by 5, it becomes
x = - 45/5 = - 9
In mathematics, a ratio is a relationship between two numbers indicating how many times the first number contains the second. For example, if a bowl of fruit contains eight oranges and six lemons, then the ratio of oranges to lemons is eight to six (that is, 8:6, which is equivalent to the ratio 4:3). Thus, a ratio can be a fraction as opposed to a whole number.The ratio for 12:8 is 6:4
Answer:
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There would be 2.5 grams of the substance left