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jarptica [38.1K]
4 years ago
5

I need help with math I tried my best but couldn’t get it

Mathematics
1 answer:
notsponge [240]4 years ago
3 0

Answer:

Step-by-step explanation:

1. Convert to slope intercept form (y=mx+b)

2. Find slope (the 'm' in mx)

3. Find slope of perpendicular line

So for the first question:

Convert to slope Intercept form if necessary:

3x+4y=12

4y=12-3x<<Subtract by 3x

y=3-<u>3/4</u>x<<Divide by 4

Find slope

y=3-<u>3/4</u>x

3/4 is the slope

Find slope of perpendicular line

To find the slope of a perpendicular line, you just have to take the reciprocal of the original slope and take the opposite sign.

Here is what I mean:

3/4<<original slope

4/3<<reciprocal

-4/3<<opposite

So for the first question -4/3 is the answer.

Now you can do the rest! Hope this helps!

(If you have more questions feel free to comment to let me know!)

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A candle is 7in tall after burning for 1 h. The same candle is 5 1/2 in y’all after burning for 4 h. How tall will the candle be
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Answer:

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Step-by-step explanation:

Given: A candle is 7 inch tall after burning for 1 hour.

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Now, finding the rate of changes in height of candle per hour.

Let "m" represent the changes in height of candle per hour.

we know, m= \frac{Changes\ in\ length}{Changes\ in\ time}

∴ m= \frac{5.5-7}{4-1} = \frac{-1.5}{3}

m= -0.5

Next, forming an equation to know the original height of candle.

using equation; y= mx+ original\ height

We know, A candle is 7 inch tall after burning for 1 hour.

⇒ 7= -0.5\times 1+ original\ height

⇒  7= -0.5+ original\ height

Adding both side by 0.5

⇒Original\ height= 7.5\ inches

Hence, the original height of candle was 7.5 inches.

Again using the same equation to find the height of candle after burning for 6 hour.

y= -0.5\times 6+ 7.5

⇒ y= -3+7.5

∴ y= 4.5 inches.

Hence, The candle will be 4.5 inches tall after burning for 6 hour.

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Answer:

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Step-by-step explanation:

??? i´ll help ???∞

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