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Korvikt [17]
3 years ago
14

Can someone please help me, giving all answers hearts, thank you in advance

Mathematics
1 answer:
zaharov [31]3 years ago
5 0

Answer:

D) y=-5/2x; y=-20

Step-by-step explanation:

If y varies directly with x, then y=kx where k is our proportionality constant

Therefore, since y=-5 when x=2, we have -5=k(2) where k=-5/2

This means that when x=8, y=(-5/2)(8)=-20, making choice D correct

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Rudik [331]
It would also be 42 because the triangle is divided in half.
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4 years ago
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A line segment connecting two vertices of a polygon is called a _______
Elan Coil [88]

Answer: diagonal

Step-by-step explanation:

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4 years ago
The perimeter of a rectangle is 56 inches. The rectangle is 20 inches long. How wide is the rectangle?
Mamont248 [21]

Answer:

The answer is A 8 inches

Step-by-step explanation:

If the perimeter is 56 inches and it is 20 inches long, then you would multiply 20 by two and get 40, then you subtract 40 from 56 and get 16. Finally, you divide 16 by two and get 8. So, A 8 inches will be your answer.

5 0
3 years ago
Selina didn't use the distributive property correctly. Where did she go wrong? Explain your thinking.​
GarryVolchara [31]

Answer:

PEMDAS

Step-by-step explanation:

Well, I don't know if there should be a picture of the problem that should go with the question. But a trick for solving distributive property is to use the trick PEMDAS In order.

For Example:

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E-Exponent

M-Multiply

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NOTE!

Remember to always Multiply and divide BEFORE adding and subtracting.

Hoped this helped!

6 0
3 years ago
Find the vertex of this parabola: y=-4x^2+8x-12
tatiyna
<span>The vertex of the parabola is the highest or lowest point of the graph. 

</span><span>y=-4x^2+8x-12 = -4 (x^2 -2x +3) 

Lets work with this now: </span>x^2 -2x +3

x^2 -2x +3 -> what is the closeset perfect square? 
x^2 -2x +1 = (x-1)^2
So
x^2 -2x +3 = (x-1)^2 +2

Replacing to original 
y=-4x^2+8x-12 = -4 (x^2 -2x +3) = -4 ((x-1)^2 +2) = -4 (x-1)^2 - 8

The min or max point is where the squared part = 0
So when x=1 , y= -4*0-8=-8

This will be the max of the parabola as there is - for the highest factor (-4x^2)

The max: x=1, y= -8
4 0
3 years ago
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