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Alina [70]
3 years ago
8

To complete the square, how do you find the value that must be added to the expression to make a perfect square trinomial? What

is the value?
x^2 + 2/5x + ?
A) square 2/5 and add to both sides; 4/25
B) take half of 2/5 and add to both sides; 1/5
C) square half of 2/5 and add to both sides; 1/25
D) take half of 2/5 and add the opposite to both sides; −1/5
Mathematics
2 answers:
Molodets [167]3 years ago
3 0
Take half of the coefficient of x (which is 2/5) and square it:

[ (1/2)(2/5) ]^2 = (1/5)^2 = 1/25, or 0.04

Thus, to rewrite x^2 + (2/5)x to include a perfect square trinomial,

x^2 + (2/5)x  = x^2 + (2/5)x + (1/5)^2 - (1/5)^2, or

                 (x+1/5)^2 - (1/5)^2, or (x + 1/5)^2 - 1/25
Readme [11.4K]3 years ago
3 0

Answer:The answer is C

Step-by-step explanation:

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5. No

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Step-by-step explanation:

4. 12 : 25 and 6 : 13 are NOT equal. NO.

5. 64 : 120 = 8 : 15 and 60 : 100 = 3 : 5. NOT equal. NO

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6 0
3 years ago
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NNADVOKAT [17]

Answer:

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5 0
3 years ago
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Evaluate ƒ( x ) = x 2 + 1 for ƒ(10).
vlabodo [156]
F(x) = x^2 + 1  f(10)
f(10) = 10^2 + 1
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7 0
3 years ago
Penny reads 14 pages in 1/3 hour. What is the unit rate for pages per​ hour? For hours per​ page?
Ne4ueva [31]

Answer: your

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Hours per page: 1/42 of a hour

Step-by-step explanation:

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5 0
3 years ago
Use the graph to find the unit rate
Diano4ka-milaya [45]
<h3>Answer:</h3>

2.4 potatoes/pound

<h3>Explanation:</h3>

The unit rate is the slope of the line. The slope of the line is ...

... (change in y-value)/(change in x-value)

... = (36 potatoes - 12 potatoes)/(15 pounds - 5 pounds)

... = (24 potatoes)/(10 pounds)

... = 2.4 potatoes/pound

_____

The relationship here is proportional, so the line goes through the point (0, 0) and the unit rate can be figured from any point:

... (12 potates)/(5 pounds) = (24 potatoes)/(10 pounds) = (36 potatoes)/(15 pounds) = 2.4 potatoes/pound

4 0
3 years ago
Read 2 more answers
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