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monitta
3 years ago
13

After taking a 70 point test, a student guesses that he got 65 points correct. Later he finds out he got 67 points

Mathematics
1 answer:
Nataliya [291]3 years ago
4 0

Answer:

Percent error = 4.29%

Step-by-step explanation:

Percent error can be defined as a measure of the extent to which an experimental value differs from the theoretical value.

Mathematically, it is given by this expression;

Percent \; error = \frac {experimental \;value - theoretical \; value}{ theoretical \;value} *100

Given the following data;

Experimental value = 67

Theoretical value = 70

Substituting into the equation, we have;

Percent \; error = \frac {67 - 70 }{ 70} *100

Percent \; error = \frac {3}{70} *100

Percent \; error =  0.04286 *100

Percent error = 4.29%

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The factor by grouping method found the GCF's of the original polynomial to be "5x" and "+6."
Elodia [21]

Answer:

(5x + 6) (x + 3)

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The picture shows how much money Aaron has in his jacket pocket. If he uses $1.12 to buy a soda, how much money does he have lef
Alexxandr [17]
Okay so, 5+3= 8$ then 5 dimes= 5x5= 0.25 so

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8.55-1.12-7.43

the answer is 7.43
8 0
3 years ago
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2(5c+ 2) - 2c = 3(2c + 3) + 7
Mademuasel [1]

Answer:

c = 6

Step-by-step explanation:

Step 1: Write equation

2(5c + 2) - 2c = 3(2c + 3) + 7

Step 2: Solve for <em>c</em>

  1. Distribute: 10c + 4 - 2c = 6c + 9 + 7
  2. Combine like terms: 8c + 4 = 6c + 16
  3. Subtract 6c on both sides: 2c + 4 = 16
  4. Subtract 4 on both sides: 2c = 12
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3 years ago
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A flag has a total area of 42 square feet.
ch4aika [34]
First it would be 42/6 and 48/6

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3 years ago
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Easton wants to put a variety of donuts in a display case. The case is large enough to hold 100 donuts. Complete the table below
shutvik [7]

The amounts for each donut are given as follows:

  • Strawberry: 15.
  • Chocolate: 45.
  • Sprinkle: 40.

<h3>How to obtain the amounts?</h3>

The amounts for each donut are found applying the proportion, multiplying the decimal equivalent of each percentage by the total number of donuts.

From the problem, the total number of donuts is given as follows:

100 donuts.

The percentages of each type of donuts are given as follows:

  • Strawberry: 15%.
  • Chocolate: 45%.
  • Sprinkle: 40%.

The decimal equivalent of each percentage is given as follows:

  • Strawberry: 0.15.
  • Chocolate: 0.45.
  • Sprinkle: 0.4.

Hence the amounts are given as follows:

  • Strawberry: 15, as 0.15 x 100 = 15.
  • Chocolate: 45, as 0.45 x 100 = 45.
  • Sprinkle: 40, as 0.4 x 100 = 40.

More can be learned about proportions at brainly.com/question/24372153

#SPJ1

3 0
1 year ago
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