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Mathematics 7 Online
zarkam21:

Help

zarkam21:

1 attachment
Vocaloid:

same process as before part I: find the y-intercept by letting x = 0

zarkam21:

y=-7

Vocaloid:

awesome, so part A = (0,-7) for part B find x = -b/(2a)

zarkam21:

-3/4

zarkam21:

that is part II right?

Vocaloid:

it is asking for both x and y so you must also find the y-coordinate by substituting x = -(3/4) into the equation

zarkam21:

y=-65/8

Vocaloid:

good, that's it for p II for part III simply plug in a b and c into the quadratic eqn

zarkam21:

what is the equation again

Vocaloid:

|dw:1515018859417:dw|

zarkam21:

x=5.06/4

Vocaloid:

there should be two solutions express them in decimals rounded to the nearest 10th

zarkam21:

1.23

Vocaloid:

good, what about the other solution?

zarkam21:

-1.23

Vocaloid:

in exact form your answer should have been -(3/4) +/- sqrt(65)/4 convert this to a decimal form. remember that +/- means you must consider the plus sign and negative sign answers

zarkam21:

3.28

Vocaloid:

-(3/4) - sqrt(65)/4 = ?

zarkam21:

-4.78

Vocaloid:

1 attachment
Vocaloid:

1 attachment
zarkam21:

oh okay, I see what I did wrong.

zarkam21:

i put the sqrt over the entire 65/4

zarkam21:

when it is suppsed to be only on the 65

Vocaloid:

1.27 and -2.77 = your answers

zarkam21:

was just about to say that

zarkam21:

thanks !!

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