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WITCHER [35]
3 years ago
5

Solve each system by substitution.

Mathematics
1 answer:
kow [346]3 years ago
8 0
Y=-6x+1
y=-5

plug second equation into first and you get

-5=-6x+1
-6=-6x
-6x=-6
6x=6
x=1

then plug x into first equation and you get that y=-6*1 +1 = -6+1=-5

therefore x=1 and y =-5
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WILL GIVE BRAINLIEST!!!!!!!!!!!!! the answer for question one was x=30
VMariaS [17]

Answer:1

1. x = 30

2. ∠ABC = 120°, ∠BCD = 90°, ∠CDA = 60°, ∠DAB = 90°

Step-by-step explanation:

It's important to note here that the measure of all interior angles in a quadrilateral will add up to 360°

We know this using the formula(n-2)\cdot 180, a 4 sided figures angles will add up to

(4-2)\cdot 180\\\\2\cdot 180\\\\360

This means that all of the angles (4x, 3x, 2x, 3x) will add up to 360.

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Combine like terms:

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Divide both sides by 12:

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We know now substitute x for 30 in for all of the side lengths.

∠ABC = 4x = 4\cdot 30 = 120°

∠BCD = 3x = 3\cdot 30 = 90°

∠CDA = 2x = 2\cdot 30 = 60°

∠DAB = 3x = 3\cdot 30 = 90°

Hope this helped!

4 0
3 years ago
Read 2 more answers
Area of Composite Figures.
tia_tia [17]
The area is 21

The area of a triangle is base*hight/2
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