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3 years ago

Find the value of c that completes the square x ^2 - 2x + c

1 answer:

8 0

The value of c to complete the square is one. In order to find the c value you divide the b value (-2) by 2 (-1) and then square that. -1 squared is 1. This can then be easily factored into (x-1)^2

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For the straight line defined by the points (2, 55) and (4, 91), determine the slope and y-intercept. do not round the answers.

mixas84 [53]

Hello : let A(2,55) B(4,91)
the slope is : (YB - YA)/(XB -XA)
(91-55)/(4-2) = 36/2 =18
an equation is : y-55 = 18(x-2)

y-intercept when : x = 0 : y - 55 = 18(0-2)
y-55 = -36
y = 55-36 = 19

4 0

3 years ago

Erica wants to know how many books on average are in school libraries in her county. She randomly calls 50 school libraries in h

Rus_ich [418]

valid. She used a representative sample
because she correctly found the average and 18,000 is a reasonable number to get for a the problem

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3 years ago

Read 2 more answers

Complete the point slope equation of the line through (-5, 7) and (-4, 0).

IgorLugansk [536]

For this case we have that by definition, the point-slope equation of a line is given by:

$y = mx + b$

Where:

m: It's the slope

b: It is the cut-off point with the y axis

We have two points:

$(x_ {1}, y_ {1}): (- 5,7)\\(x_ {2}, y_ {2}): (- 4,0)$

We found the slope:

$m = \frac {y_ {2} -y_ {1}} {x_ {2} -x_ {1}} = \frac {0-7} {- 4 - (- 5)} = \frac {-7} {-4 + 5} = \frac {-7} {1} = - 7$

Thus, the equation is of the form:

$y = -7x + b$

We substitute one of the points and find "b":

$0 = -7 (-4) + b\\0 = 28 + b\\b = -28$

Finally, the equation is:

$y = -7x-28$

Answer:

$y = -7x-28$

5 0

3 years ago

<img src="https://tex.z-dn.net/?f=4859%20%5Cdiv%2023" id="TexFormula1" title="4859 \div 23" alt="4859 \div 23" align="absmiddle"

DerKrebs [107]

The answer is 211.26087

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3 years ago

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2. Si x representa la edad de Ana, ¿cómo se

defon

Si coma Ana¿ la Mitad de la edad

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3 years ago