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Roman55 [17]
3 years ago
10

Solve the following system of equations using the substitution method.

Mathematics
1 answer:
eduard3 years ago
7 0
The correct answer would be D, (3,-4). For the first equation, x=2y+11 would be 3=2(-4)+11 which turns to 3=-8+11 which equals 3=3 so it’s true. For the second equation, 7x+2y=13 which becomes 7(3)+2(-4)=13 making it 21-8=13 which turns into 13=13 so this is true as well.
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Elena L [17]

The answer would be

y=-1/2x +4

8 0
2 years ago
2/3 of the cost of the sweater is $18
blagie [28]
The total of the sweater is $27. 
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3 0
3 years ago
Work out the length of the perimeter.
PilotLPTM [1.2K]
Try this option:
According to property such triangle
1. area=0.5*a*b, where a and b - the sides of angle 90°.
Using this equation: 180=0.5*40*b, ⇒ b=9.
2. c²=a²+b², ⇒c=√(9²+40²)=41 - the third side of the triangle;
3. Perimeter=a+b+c=9+40+41=90 cm.

answer: 90 cm.
3 0
2 years ago
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Fofino [41]

Answer:

22

Step-by-step explanation:

x-1 is a midsegment.

According to the Triangle midsegment theorem, x-1 is half of the third side (42)

x-1 = 42/2

x-1 = 21

x= 22

or

2x-2=42

2x=44

x=22

Hope this helps!

6 0
3 years ago
Read 2 more answers
Please help me with this, thanks
Liono4ka [1.6K]
The answer is 0.40 or 0.4
5 0
3 years ago
Read 2 more answers
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