If her second test was x and her third was x+1 (since it was 1 more than the second), we get 75+x+x+1=76+2x as our total test scores. Next, to get the average you add up the numbers and divide it by the amount of numbers you have. Since we have 3 tests and our sum is 76+2x, we divide it by 3 to get (76+2x)/3=average=82. Multiplying both sides by 3, we get 246=76+2x. Next, we subtract both sides by 76 to get 170=2x. Lastly, we divide both sides by 2 to get 85=x= the second test score. Her third test score is x+1=85+1=86
Answer:
An irrational number is a number which cannot be expressed in a ratio of two integers. In rational numbers, both numerator and denominator are whole numbers, where the denominator is not equal to zero. While an irrational number cannot be written in a fraction.
Step-by-step explanation: Cuz i said so
Answer:
x = 2
Step-by-step explanation:
<em><u>1. Combine multiplied terms into a single fraction</u></em>
<em><u>19.2 − 15 = 7.5 + 8.4</u></em>
<em><u>96/5 − 15 = 7.5x + 8.4</u></em>
<u><em></em></u>
<u><em>2. Combine multiplied terms into a single fraction again</em></u>
<em><u>96/5 − 15 = 7.5x + 8.4</u></em>
<em><u>96/5 − 15 = 15x/2 + 8.4 </u></em>
<em><u /></em>
<em><u>3. Add 15 to both sides of the equation</u></em>
<u><em>96/5 − 15 = 15x/2 + 8.4 </em></u>
<u><em>96/5 − 15 + 15 = 15x/2 + 8.4 + 15</em></u>
<u><em /></u>
<u><em>4. Simplify</em></u>
- <u><em>Add the numbers</em></u>
<em> </em><u><em>96/5 = 15x/2 + 8.4 +1.5</em></u>
- <u><em>Add the numbers again</em></u>
<em> </em><u><em>96/5 = 15x/2 + 23.4</em></u>
<u><em /></u>
<u><em>5. Multiply all terms by the same value to eliminate fraction denominators</em></u>
<u><em>96/5 = 15x/2 + 23.4</em></u>
<u><em>2 x 5 x 96/5 = 2 x 5(15x/2 + 23.4)</em></u>
<u><em>7. solution</em></u>
<u><em>x=2</em></u>
<u><em /></u>
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Answer:
Percent error = 11.6%
Step-by-step explanation:
Given the following data;
Actual height, A = 14.7 m
Estimated height, E = 13 m
a. To find the absolute error;
Absolute error = A - E
Absolute error = 14.7 - 13
Absolute error = 1.7
b. To find the percent error;
Percent error can be defined as a measure of the extent to which an experimental (estimated) value differs from the actual or theoretical value.
Mathematically, it is given by this expression;
Substituting into the equation, we have;
Percent error = 11.57 ≈ 11.6%
Answer:
-27
Step-by-step explanation: