Answer: The number is: "2" .
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The expression is: 2 − (½)x = (½)<span>x ;
</span>→<span> in which "x" is the "unknown number".
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Explanation:
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Given:
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"Two decreased by a half of a number is one-half<span> of the number" ;
Let "x" represent the "unknown number" for which we wish to solve;
Write the expression as:
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" </span>2 − (½)x = (½)x " .
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Note: Add "(½)x" to EACH SIDE of the equation:
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2 − (½)x + (½)x = (½)x + (<span>½)</span>x ;
to get:
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→ 2 = 1x ;
↔ 1x = 2 ;
↔ x = 2 .
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Answer: The number is: " 2 " .
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The area for the figure is 146
Answer:
700.4 cm
Step-by-step explanation:
Use a proportion.
Let x be the vertical distance for the 700 cm pipe.
1 cm is to 30 cm as x cm is to 700 cm
1/30 = x/700
30x = 1 * 700
30x = 700
3x = 70
x = 70/3
Now we need l. We have a right triangle with legs measuring 70/3 cm and 700 cm, and we are looking for the hypotenuse l.
a^2 + b^2 = c^2
(70/3)^2 + 700^2 = c^2
c^2 = 4900/9 + 490000
c = 700.4
l = 700.4 cm
You have to make the denominators the same so you would multiply the three by seven to get 21 and then you would do the same to two and then you can subtract
