# Tutor profile: Ben S.

## Questions

### Subject: French

When do I use Passé Composé verbs vs using Imparfait?

Passé Composé verb tense is used for: -Actions that happened in isolation from others. -Complete, finished actions -Actions that happen at a specific moment -Used to describe something that happened a specific number of times. -For actions that happen while another event is happening Imparfait verb tense is used for: -Descriptive language -Setting the scene before another event happened -Incomplete actions -Telling of something you do on a regular basis. -For telling of something that happened over a vague, general time period

### Subject: Algebra

In Algebra we are finding an unknown value like in the following example: Solve: 2x=(30-2x)/4

Let's begin solving for the unknown x-value in this equation: 2x=(30-2x)/4. First thing, I'll find a common denominator of 1, by multiplying both sides of the equation by 4. 2x • 4 =((30 - 2x ) / 4 )• 4 Now we are left with: 2x • 4 = 30 - 2x This simplifies to 8x = 30 -2x Let's bring all the x's to one side of the equation. To do this we will add 2x to each side of the equation. As long as we alter each side of the equation the same, we can do anything we want to our equation. This goes along with the principle of a scale. Picture a perfectly balanced teeter-totter type of scale. If we add 10 lbs to each side of the scale, It will not move. The weight on one side of the scale is still equal to the weight on the other side of it. Same goes for a mathematical equation. If we add 2x's to each side of the equation, we have essentially not changed the equation. But, we are working to simplify it. 8x + 2x = 30 -2x + 2x This gives us: 10x = 30 + 0x 10x = 30 Now to isolate the unknown x, let's let's divide each side of the equation by 10. (10x)/10 = (30)/10 x = 30/10 x=3 We have now solved this equation. x=3 is our answer. Well done.

### Subject: Physics

How do I draw a free body diagram?

You begin by reading the question through and noting all data given. Ex. Somewhere on earth is a 1 kg ball. A 10N force is applied on the ball in the eastern direction. A 5N force is applied on the ball in the northern direction. Given: F1 = 10N→ F2 = 5N↑ Fg (Force of gravity) ↓ Now to draw your free body diagram, begin with a dot in the center. The dot represents the ball referred to in the question. Then draw arrows to represent forces acting on the ball. For our example question, we will draw: -One arrow down from the ball to represent the Force of gravity acting on the ball. -One arrow east from the ball to represent F1 -One arrow north from the ball to represent F2

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