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3 years ago

HELP! 20 POINTS

Mathematics

1 answer:

Oxana [17]3 years ago

8 0

If the point is on the graph, we'll get true equation.

y= -(1/3)*x

A. (1,0) 0= -(1/3)*1, False
B.(0,1) 1 = -(1/3)*0 , False
C. (-3,1) 1= -(1/3)*(-3), 1=1 , True
D. (2, -3) -3 = -(1/3)*2, -3 =-2/3 False

Answer is C.

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The answer to number 3

olga55 [171]

3x^2 + 3x - 6

First factor out the 3 in front of x^2:

3( x^2 + x - 2 )

Now we can look at the inside of the brackets, and find two numbers that, when multiplied, give -2, and when added, give +1. You will usually find them if you create a list of factors of the constant term (-2 in this case).

2 * -1 = -2
2 + -1 = 1

So the factorization becomes 3(x+2)(x-1)

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3 years ago

Compare the population using measures of center and variations

Vika [28.1K]

Answer:

Do you have a graph or a picture tagged along with the question

Step-by-step explanation:

Graph to solve?

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4 years ago

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valentina_108 [34]

I can help you in spanish

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3 years ago

Solve the system. Enter the smallest x-coordinate first

pentagon [3]

$y= 3 \,\,,\,\,x= -2 \,\,and\,\, y=3\,\,,\,\, x=2$

Step-by-step explanation:

Solving the following system of equations:

$x^2-y=1\\2x^2+y^2=17$

Let

$x^2-y=1\,\,\,(1)\\2x^2+y^2=17\,\,\,(2)$

Putting value of x^2 in eq(2)

$x^2 = 1+y\\Putting\,\,value\,\,of\,\,x^2\,\,in\,\,eq(2)\\2(1+y)+y^2=17\\2+2y+y^2=17\\y^2+2y+2-17=0\\y^2+2y-15=0\\Factorizing:\\y^2-3y+5y-15=0\\y(y-3)+5(y-3)=0\\(y+5)(y-3)=0\\y+5=0 \,\,and \,\, y-3=0\\y = -5 \,\,and \,\, y=3$

Now, finding value of x

Putting y=-5

$x^2 = 1+y\\x^2=1-5\\x^2=-4\\Taking\,\,square\,\,root\\x= \pm2i$

y=-5, x= 2i and y=-5 , x= -2i

Since we need to find x and y coordinates and its value cannot be in terms of i so we will not consider these as answer

Putting y=3

$x^2 = 1+y\\x^2=1+3\\x^2=4\\Taking\,\,square\,\,root\\x= \pm2$

So, $y= 3 \,\,,\,\,x= -2 \,\,and\,\, y=3\,\,,\,\, x=2$

Keywords: system of equations

Learn more about system of equations at:

#learnwithBrainly

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3 years ago

Elena is making greeting cards, which she will sell by the box at an arts fair. She paid $54 for

TiliK225 [7]

Answer:

Elena's sales and expenses will both be $

396

if she sells

boxes of cards.

Step-by-step explanation:

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