8x^2 + 9 - 6x^2 - 2x - 2
= 2x^2 - 2x + 7
answer is B
2x^2 - 2x + 7
Answer:
6.25%
Step-by-step explanation:
Percent error is calculated by taking the difference of measured value and correct value divided by correct value and multiplied by 100%.
Mathematically,
Percent error = (correct value - measured value)/correct value * 100%
_________________________________________________
in the problem given
measured value = 75 degrees Celsius
correct value = 80 degrees Celsius ( as given in reference book)
thus,
Percent error = (80 - 75)/80 * 100%
Percent error = (5/80 )* 100% = 6.25%
Percent error calculated by him is 6.25%.
Answer:
15:25 simplified = 3:5
Step-by-step explanation:
1st step= find out what is the highest command factor
We know it is 5
So we do 15 divided by 5 which is 3
And 25 divided by 5 which is 5
So the answer is 3:5
Answer:
Circumference: 47.1 inches Area: 176.71 inches ²
Step-by-step explanation:
To find the circumference of a circle, you multiply the diameter(15) to pi (3.14).
To find the area of a circle, you find the radius of the circle, which is half of the diameter (7.5), square it, which equals 56.25, multiply that by pi (3.14) and there is your area. Make sure to write your answer to area in square inches.
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