7 as
a percentage of 20 just means what percentage of 20 is 7. To do this, we must
divide 7 by 20. This is how you answer this. If you do so, then you will get
0.35. This shows that it is 35%. Note that when you get a decimal number, then
you must multiply it by 100% to get the percentage equivalent of that number.
Therefore, 7 as a percentage of 20 is 35%.
Answer: The last one 15
+15g
Step-by-step explanation:
The last one , is not equivalent because after simplifying the expression, you will get 15g^2 + 45g and the last one doesn't match to it.
<h3>
Answer: the fraction -8/117</h3>
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First, convert to an improper fraction
3 & 1/4 = 3 + (1/4)
3 & 1/4 = (12/4) + (1/4)
3 & 1/4 = 13/4
The mixed number 3&1/4 turns into the improper fraction 13/4
---------------
-2/9 divided by (3&1/4) = -2/9 divided by 13/4
To divide two fractions, you flip the second one and then you multiply
"-2/9 divided by 13/4" turns into "-2/9 times 4/13" after this happens
Then you multiply straight across. The numerators stick together. The denominators stick together.
numerators: -2*4 = -8
denominators: 9*13 = 117
We end up with the fraction -8/117
This cannot be reduced as there are no common factors (other than 1) between 8 and 117.
<h3>
Answer: Obtuse</h3>
This is because the lower left angle is larger than 90 degrees. This is assuming the triangle is drawn to scale (i.e. drawn accurately).
Any time there's an angle larger than 90, the triangle will be obtuse. If there's one angle exactly 90, then it's a right triangle. Otherwise, the triangle is acute (when all angles are smaller than 90).
6.3
use the equation 4/3 *r^3 *pi for each, then find the difference
