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melomori [17]
3 years ago
15

What is 10% of 30 what is the answer

Mathematics
1 answer:
REY [17]3 years ago
8 0
For your problem, you would have to covert 10% into a decimal = .10 by moving the decimal point 2 times to the left since percent is based from 100. Then you would multiply .10 by 30 and get 3. 

In a simpler way, you can move the decimal point once to the left since 10% has one zero.  If you do that you get 3. That is just a small, efficient trick. 

Hope you find this useful :)

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Choose a variable to represent one of the unknowns. Express the remaining unknowns in terms of the variable you chose in step 1.
jok3333 [9.3K]

Let's just choose "x" as our variable for the length of a side of the triangle.

Two sides of a triangle are equal in length and double the length of the shortest side.

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The perimeter of the triangle is 35 inches. Perimeter is the sum of all sides.

x + 2x + 2x = 35

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6 0
3 years ago
If 9a+5b+5c=9 what is -10c-18a-10b?
Rus_ich [418]
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Multiplying the whole equation by -2.

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Hence, the answer is -18.
6 0
3 years ago
What is the approximate percent decrease when a fish count goes down from 850 to 500? The percent decrease is approximately 40%.
Korolek [52]

Answer:

<h2><em>The percent decrease is approximately 40%. </em></h2>

Step-by-step explanation:

Step one:

given data

initial count of fish= 850

final count of fish= 500

Required

% decrease

Step two:

% decrease= final-initial/initial*100

substitute

% decrease= 850-500/850*100

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% decrease= 0.41*100

% decrease= 40.1%

<em>The percent decrease is approximately 40%. </em>

7 0
3 years ago
Read 2 more answers
Substract 11 3/4 - 9 8/15
Tju [1.3M]

Answer:

2 and 13/60

Step-by-step explanation:

First, we must create a common denominator in the fractions. For the given denominators, it would be 60, so 3/4 would be 45/60 and 8/15 would be 32/60. From here, we can just subtract and get 2 and 13/60.

Hope this helps!

3 0
3 years ago
Simplify the expression.<br> (-0.75x - 5)-(3.5x + 7.4)<br> The simplified expression is
astra-53 [7]
−5−4.25⋅−7.4
Writing this to meet 20 character requirement
5 0
2 years ago
Read 2 more answers
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