X^2 = 4 x (20-4) =64. So x =8
Answer:
Step-by-step explanation:
You need to solve the equation for x.
First change all the mixed numbers to improper fractions. Remember that a improper fraction the numerator (top number) is larger than the denominator (bottom number).
All you need to do is multiply the numerator with the whole number, then add to the numerator:
Now simplify, to get rid of the numbers that are dividing:
Cancel same numbers that are multiplying and dividing:
Clear X:
Simplify
you will get the following improper fraction: 
and for the mixed fraction you will have 
You start with 5x+8=10. You want all your constants on one side and variables on the other. So to do that you subtract 8 from both sides, giving you 5x=2. Next you have to divide each side by 2. That gives you 5x/2, or 2.5x. You then take your next equation, 10x+16 and input x. 10(2.5)+16=41.
Your answer is 41 or 10x+16=41
9514 1404 393
Answer:
Step-by-step explanation:
It can be useful to consider the percent symbol (%) as a shorthand way to write /100. That is, where you see %, /100 is completely equivalent.
49% = 49/100
If you recognize that 1/100 (one hundredth) is 0.01 in decimal (one hundredth), then you can see that 49/100 = 49×0.01 = 0.49.
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A lot of folks consider the % symbol to be separate from the number, just as units of degrees or hours or inches might be. So, they tell you to do the conversion by moving the decimal point on the % value 2 places to the left (and drop the % symbol):
49% = 49.% = .49
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<em>Additional comment</em>
As you can tell, I think of the % symbol as part of the number 49%, just as /100 is part of the number 49/100. Forty-nine hundredths can be written as any of 49/100 or 0.49 or 49%.
1. Six-hundred (and) eighty-four
2. 600+80+4
