Answer:
x = -4
y = -4
Step-by-step explanation:
Since y = x, we can say:
x = 2x + 4
-x = 4
<u>x = -4</u>
And now we can substitute -4 in for x, in the equation y = x
<u>y = -4 </u>
Hope this helps!
The number of laps that Swimmer A swam was 50 laps.
<h3>How to form mathematical expression from the given description?</h3>
You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on methods can be used to convert description to mathematical expressions.
Let we suppose that:
Swimmer A swam x laps
Swimmer B swam y laps.
Then, according to the given data, we have:
x + y = 175 laps
y = 25 + 2x
(25 more than twice of laps of A is the number of laps of B).
Thus, we get a system of two equations:
x + 25 + 2x = 175
3x + 25 = 175
3x = 175 - 25 = 150
x = 50
As x is the number of laps Swimmer A swam, thus, the number of laps that Swimmer A swam was 50 laps.
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C. I think is the right answer.
Answer: x > 6
Step-by-step explanation: Since <em>x</em> is being multiplied by 7,
we divide by 7 on both sides of the inequality to get x > 6.
Now you should write your answer in set notation.
So we have {x: x > 6} which means that
any number greater than 6 is a solution.
210 divided by 12 is 17.5 so u]your answer is 17.5
