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Vaselesa [24]
3 years ago
7

The sum of two rational numbers is -2. If one of the numbers is -14/5, find the other.

Mathematics
2 answers:
Marat540 [252]3 years ago
7 0

Answer:

\frac{4}{5}

Step-by-step explanation:

\frac{ - 14}{5}  + x =  - 2 \\ x =  - 2 +  \frac{14}{5 }  \\ x =  \frac{ - 10 + 14}{5}  \\ \: x =  \frac{4}{5}  \\ therefore \: the \: other \: number \: is \:  \frac{4}{5}

olga nikolaevna [1]3 years ago
3 0

Answer:

4/5

Step-by-step explanation:

x+(-14/5)= -2

x= 14/5 - 2

x= (14-10)/5

x= 4/5

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Answer:   (-2, 5) and (2, -3)

<u>Step-by-step explanation:</u>

Graph the line y = -2x + 1 (which is in y = mx + b format) by plotting the y-intercept (b = 1) on the y-axis and then using the slope (m = -2) to plot the second point by going down 2 and right 1 unit from the first point:

        y - intercept = (0, 1)            2nd point = ( -1, 1).

Graph the parabola y = x² - 2x - 3 by first plotting the vertex and then plotting the y-intercept (or some other point):

y = x^2-2x-3\quad \rightarrow \quad a=1,\ b=-2,\ c=-3\\\\\text{axis of symmetry:}\ x = \dfrac{-b}{2a}\ \longrightarrow \ x=\dfrac{-(-2)}{2(1)}=\dfrac{2}{2}=1\\\\\text{y-value of vertex:}\ f(1) = (1)^2-2(1)-3\quad \longrightarrow \quad y = 1 - 2 - 3=-4\\\\\text{y-intercept:}\ f(0)= (0)^2-2(0)-3\ \longrightarrow \ y=0 - 0 - 3 = -3 \\

         vertex = (1, -4)                2nd point (y-intercept) = (0, -3)


<em>see attached</em> - the graphs intersect at two points:  (-2, 5) and (2, -3)


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