2 years ago

Please answer thanks. Come on its 30 points

Mathematics

2 answers:

exis [7]2 years ago

4 0

Wait what????? I’m confused answer what lol

VashaNatasha [74]2 years ago

3 0

Be right there! Let's do this!

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Solve the system of equations: y= 3x y= x^2 - 4

OLga [1]

Answer:

$x=-1\\y=-3\\\\x=4\\y=12$

Step-by-step explanation:

Make both equations equal to each other and solve for the variable x:

$y=y\\3x=x^2-4\\x^2-3x-4=0\\$

Find two numbers that when you add them you get -3 and the product of both numbers be -4. These numbers are 1 and -4. Then:

$(x+1)(x-4)=0\\\\x+1=0\\x=-1\\\\x-4=0\\x=4$

Substitute these values into one the original equations and solve for y:

$y=3(-1)\\y=-3\\\\y=3(4)\\y=12$

Therefore, you get that:

$x=-1\\y=-3\\\\x=4\\y=12$

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3 years ago

Newborn babies have lengths that are all very similar to one another. Which of the following would be the best measure of the ce

Mnenie [13.5K]

Answer:

In these situations, the median is generally considered to be the best representative of the central location of the data. The more skewed the distribution, the greater the difference between the median and mean, and the greater emphasis should be placed on using the median as opposed to the mean.

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3 years ago

3(x-7) ≥ -4x + 7 , what is the value of x

Anna [14]

Answer:

X≥4

Step-by-step explanation:

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2 years ago

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X+y/x-y=1/2 solve for y

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