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RoseWind [281]
3 years ago
8

Which ratios form a proportion ? 1 / 6 & 3/8? 2/3 & 8/12? 2/5 or 5/2? or . 3/4 & 9/16?

Mathematics
1 answer:
lapo4ka [179]3 years ago
5 0
2/3 & 8/12
3/4 & 9/16
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Answer:

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Step-by-step explanation:

This is an isosceles triangle because two of the sides are the same length which means the 2 bottom angles are the exact same which means we can set them equal to each other to solve for it.

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-6.2 - 12.6x = 5.8 - 7.8x
Sav [38]

Answer:

x = -2.5

Step-by-step explanation:

Step 1: Write equation

-6.2 - 12.6x = 5.8 - 7.8x

Step 2: Solve for <em>x</em>

<u>Add 12.6x on both sides:</u> -6.2 = 5.8 + 4.8x

<u>Subtract 5.8 on both sides:</u> -12 = 4.8x

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Step 3: Check

<em>Plug in x to verify if it's a solution.</em>

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-4x=30-2y , - 15 = - 2y + 11x Which the first step determining the given ordered pair solution?A. Replace x with 13 and y with -
Andru [333]

Answer:

B. Solve each equation for a variable

Is (-1,13) a solution of the system:  Yes it is x =1, y= 13

Step-by-step explanation:

-4x=30-2y

- 15 = - 2y + 11x

-4x=30-2y

-2y+4y = -30-------------------i

- 2y + 11x=  - 15 ---------------ii

make x the subject of formula in equ i

-4x=30-2y

x= (30-2y)/-4

insert x= (30-2y)/-4 in equ ii

- 2y + 11x=  - 15

-2y+ 11((30-2y)/-4)= -15

-2y+(330-22y)/4 = -15

-8y+330-22y/4 = -15

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cross multiply

-30y+330 = 4x-15 = -60

-30y = -60-330

-30y =--390

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