Systems of equations
y=2x+3
y=-x-9
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The solution is (-4,-5)

Step-by-step explanation:

First step - rewrite the equation to single out the variables.

Step-by-step explanation:

Write the equation again as 2x+3=-x-9

Solve for x and get  x = -4

Then, substitute x into the old equation as y = 2(-4)+3 and solve for y.

Solve for y and get y = -5

x = -4   y= -5

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

(1, –1), (16, –4), (36, –6)

step-by-step explanation:

given that the function is

this can also be written as

we have to graph this function and check which list of points lie on the graph

see attachment for graph:

we find that the points lying are (1,-1) (16,-4) and (36,-6)

since square root is there we find that x can only be posiitve but y can be since square root both positive and negative.