How many solutions does the system have? y=-2x -4 y=3x + 3

Mathematics

1 answer:

baherus [9]3 years ago

7 0

Answer:

x=−7/5and y=−6/5

Step-by-step explanation:

Step: Substitute−2x−4foryiny=3x+3:

y=3x+3

−2x−4=3x+3

−2x−4+−3x=3x+3+−3x(Add -3x to both sides)

−5x−4=3

−5x−4+4=3+4(Add 4 to both sides)

−5x=7

−5x

−5

(Divide both sides by -5)

x=−7/5

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For each pair of points below, think about the line that joins them. For which pairs is the line parallel to the y-axis? Circle

zaharov [31]

Answer:

a) Not parallel to y-axis

b) Not parallel to y-axis

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Step-by-step explanation:

The best way to check whether a line passing through two points is parlle to y-axis is by plotting them on graph.

The equation of line: $(y-y_1) = \frac{y_2 - y_1}{x_2 - x_1}(x-x_1)$

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Another points that could be lie on this line are (0.6,2) and (0.25,1.475)

c) The line joining the points $(0.8, 1.9), (0.8,2.3)$ is parallel to y-axis because points have the same x-coordinate.

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5 0

4 years ago

Choose the ratio that you would use to convert 2.5 centimeters to meters please

WINSTONCH [101]

First of all, 100cm makes 1m. So compare the statements
100cm=1m
2.5cm=Y
I represented the unknown with Y. Cross and multiply. 2.5 will multiply 1 to give 2.5 and Y will multiply 100 to give 100Y. That will be;
100Y=2.5
Divide both sides by 100
Y=2.5/100
But remember; 100cm is 1 meter. So that will be the same as;
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which is C
Hope that helped. Have a nice day

6 0

4 years ago

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