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natita [175]
2 years ago
11

Solve thePiSimultaneous equationusing elimination3x+2y=22x+2y =-7​

Mathematics
1 answer:
torisob [31]2 years ago
5 0

Answer:

x= 9

y=-12.5

Step-by-step explanation:

3x+2y = 2×2

2x+2y =-7×3

6x+4y =4

- 6×+6y =-21

-2y =25

y=-12,5

2x+2(-12,5)= -7

2x+-25= -7

2x= -7+25

2x/2=18/2

x= 9

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How do you write 20% as a decimal
77julia77 [94]

Answer:

0.2

Step-by-step explanation:

20/100=0.2


3 0
3 years ago
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the length of a rectangular label is 2.5 cm less than twice the width. the perimeter is 40.6 cm. find the width.
Aleksandr [31]
Let the width be w, then the length is 2w - 2.5.
Perimeter = 2(length + width)
40.6 = 2(2w - 2.5 + w) = 2(3w - 2.5)
3w - 2.5 = 40.6/2 = 20.3
3w = 20.3 + 2.5 = 22.8
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3 0
3 years ago
Given a circle with radius of 2, which is the degree measure of an arc whose length is 1/2 ?
Finger [1]
180 degrees. It would be half of the circle.
3 0
3 years ago
The bakery shop purchased 7 2/10 pounds of sugar and 7 5/10 pounds of flour. How much sugar and flour did they purchase in all?​
gizmo_the_mogwai [7]

Answer:

Sugar = 1-2/5 pounds, Flour = 3-1/2 pounds

Together = 5-9/10 pounds

Step-by-step explanation:

sugar = 7(2/10)

flour = 7(5/10)

sugar + flour = 7(2/10) + 7(5/10)

sugar = 14/10 or 1-2/5 pounds

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Answer:

x = 2 and y = 1

Step-by-step explanation:

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