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irina1246 [14]
3 years ago
9

You estimate that a piglet weighs 9 pounds. The actual weight of the piglet is 11 pounds. Find the percent error. Round your ans

wer to the nearest hundredth of a percent. PLEASE ANSWER
Mathematics
1 answer:
Alexandra [31]3 years ago
3 0
The percent error is calculated like by subtracting the actual amount from the estimated amount, dividing by the actual amount, taking the absolute value of this number, and multiplying by 100:

|\frac{estimated -actual}{actual} |*100

Plug in the values:

|\frac{9-11}{11} |*100= \\ \\ | \frac{-2}{11} |*100 $\approx$ \\ \\ \(\lvert -0.1818\rvert\) *100= \\ \\ 0.1818*100=18.18\%

The percent error should be ~18.18%.
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Suppose that y varies directly with x and y=10 when x=20. What is y when x=15
Likurg_2 [28]

Answer:

y=kx

subst y=10 and x=20 into the above

<em>1</em><em>0</em><em>=</em><em>k20</em>

<em>k</em><em>=</em><em>1</em><em>0</em><em>/</em><em>2</em><em>0</em>

<em>k</em><em>=</em><em>1</em><em>/</em><em>2</em>

<em>therefore</em><em> </em><em>relationship</em><em>:</em><em> </em><em>y</em><em>=</em><em>1</em><em>/</em><em>2</em><em>x</em>

<em>subst</em><em> </em><em>x</em><em>=</em><em>1</em><em>5</em><em> </em><em>into</em><em> </em><em>the</em><em> </em><em>relationship</em>

<em> </em><em>y</em><em>=</em><em>1</em><em>/</em><em>2</em><em>(</em><em>1</em><em>5</em><em>)</em>

<em>y</em><em>=</em><em>7</em><em>,</em><em>5</em>

Step by step explanation:

  • Step 1: when they say y varies directly with x they mean<em> y is proportional to x</em>
  • step 2: so y=kx where <em>k is the constant</em>
  • step 3: is to substitute <em>y=10</em> and <em>x=20</em> into the above equation y=kx
  • step 4: you will end up with <em>10=k20</em> then divide both sides by 20 so that <em>k becomes the subject of the formula </em>
  • step 5: your answer from the above will be <em>k=10/20 </em>so the relationship is <em>y is directly proportional to 1/2 x </em>what you did here is that you substituted k for 1/2 in the equation in step 3
  • step 6: is to finally substitute x=15 into the equation <em>y=1/2x</em> to finally get your answer <em>y</em><em>=</em><em>7</em><em>,</em><em>5</em><em>.</em>
4 0
3 years ago
12) PLS HELP ASAP<br><br><br>BRAINLIEST AND 10 + POINTS :)
puteri [66]

Answer:

the first one

Step-by-step explanation:

7 0
3 years ago
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Solve for x (13x + 2) (5x - 7) (3x - 4)<br><br><br> Thank you
Law Incorporation [45]

\huge \bf༆ Answer ༄

As we know, sum of interior angles of a triangle is 180°

that is ~

  • \sf13x + 2 + 5x - 7 + 3x - 4 = 180

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  • \sf21x = 180 + 9

  • \sf x =  \dfrac{189}{21}

  • \sf x = 9 \degree

Hence, value of x is 9°

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2 years ago
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Rudiy27

Answer:

Step-by-step explanation:

you have a special triangle 30-60-90

the ration in this traingle is x, x\sqrt{3} , 2x, where 2x is the hypothenuse

the hypothenuse is 12

x=12/2=6

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maksim [4K]

i) first you combine the like terms; 3x² and x², then 4x and -8x, then -7n and -1.

Then you would get 4x²-4x-8.

You then cannot simplify further. so your answer would be 4x²-4x-8.

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