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Tutor profile: Melissa M.

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Melissa M.
Biomedical Sciences Graduate Student
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Questions

Subject: Pre-Algebra

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Question:

Solve this equality! Hint, this is a good way to practice cross multiplication! 15/x = 5/6 . What is the value of x? plug this value back in to check your work!

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Melissa M.
Answer:

The first step in this equation would be to cross multiply the variable. You can set up the equation by multiplying the denominator with the numerator on opposite sides of the equation. For example, take the numerator on the left side, 15, and multiply it by the denominator on the right side which is 6. Then take the denominator on the left and multiply it by the numerator on the right, so you would have (x) x 5, you can also write this as 5x. The equation should then look like this: 15x6=5x this can then be simplified by multiplying 15 and 6 to get 90. The equation will then be re-written as 90=5x. Our next step will be to isolate x by dividing both the right and left sides of the equation by 5. 90/5= 18 and 5 multiplied by x divided by 5 is just x. so the final step of this simplification we get 18=x. We have now solved for x and have an answer. to check out the answer, we can plug 18 back into the original equality to see if this is a true solution for x. we would then have equality that looks like this: 15/18 = 5/6 we can simplify the equation on the left side of the equation, or multiply the equation on the left side to see that this is a correct answer for x. If we multiply the right side of the equation by a fraction of 3/3 we can see that 5x3=15 and 6x3=18 so these are in fact the same fraction. We can also divide the left fraction by 3/3 to see that 15/3=5 and 18/3 is 6 so in fact, 5/6 is equal to 5/6/ Our correct answer for this equality is x=18.

Subject: Biology

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Question:

1. When the chromosomes line up in mitosis this is known as which phase? Telophase Anaphase Metaphase Prophase

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Melissa M.
Answer:

the correct answer is telophase. explanation: Mitosis has four stages: prophase, metaphase, anaphase, and telophase. (a good acronym to remember this is PMAT!) In this case, the phase where the chromosomes line up in mitosis is known as Telophase!

Subject: Algebra

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Question:

Solve this equation to find the value of x. Show your work and plug the value back into the equation to test your answer. Equation: 3x + 2 = 14, x=?

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Melissa M.
Answer:

The first step in solving for x would be to subtract 2 from both sides of the equation when we do this we are left with the equation 3x=12. (14-2=12). The next step should be to isolate the variable x on the left side of the equal sign and then get a solution for this variable. To isolate x we should divide both sides of the equation by 3. IF we do this on the left side, we are just left with x which is exactly what we want! on the right side 12/3= 4. so as a solution we get that x=4. However, we are not done yet with the equation. to test that this is the right answer for any solution set we encounter, we should plug back in the value of x and see if the equation remains correct. To plug back in the equation should look something like this: 3(4)=12. if we multiply out the parenthesis on the left side of the equation 3x4=12. we see that this is in fact correct12=12. so we found the correct answer for this equation.

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