3 years ago

What is negative 9/14 plus 2/7

1 answer:

4 0

Find the LCD of 9/14 and 2/7. LCD is 14.

Make the denominators(bottom numbers) the same as the LCD(14)

Simplify. Now denominators are same and even

Join the denominators so make it into -9 + 4 / 14

Now simplify it lastly

Answer: 5/-14.

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Heather measures the temperature of her coffee to be 133.4 degrees fahrenheit. It is actually 145 degrees fahrenheit. What is th

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Answer:

The percent error of Heather's calculation is <u>8%</u>.

Step-by-step explanation:

Given:

Heather measures the temperature of her coffee to be 133.4 degrees fahrenheit. It is actually 145 degrees fahrenheit.

Now, to find the percent error of Heather's calculation.

The temperature of coffee Heather measures = 133.4° F.

Coffee's actual temperature = 145° F.

So, to get the measurement in error we subtract the temperature of coffee Heather measures from coffee's actual temperature:

$145-133.4=11.6\°.$

Now, to get the percent error:

$\frac{11.6}{145}\times 100$

$=\frac{1160}{145}$

$=8\%.$

Therefore, the percent error of Heather's calculation is 8%.

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