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nirvana33 [79]
3 years ago
12

I need help with these problems

Mathematics
1 answer:
Lesechka [4]3 years ago
4 0
Part A: 1/6
Part B: 5/6
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How to change 13/20 to a percent
ASHA 777 [7]

Answer:

65%

Step-by-step explanation:

Since percentages are out of 100, you can write 13/20 as (13*5)/(20*5) = 65/100, which translates to 65%

8 0
2 years ago
Read 2 more answers
what is peter's number? "if you subtract 12 from my number and multiply the difference by -3, the result is -54
lara31 [8.8K]

Answer:

30

Step-by-step explanation:

-54/-3 = 18

18+12 = 30

7 0
3 years ago
The perimeter of a rectangle is 36m. If its length is increased by 1m and the width is increased by 2m, its area will increase b
maw [93]

Answer:

  80 m^2

Step-by-step explanation:

The given information lets you write two equations involving length (x) and width (y).

  • 2(x +y) = 36 . . . . the perimeter is 36 m
  • (x+1)(y+2) -xy = 30 . . . . increasing the length and width increases area

The second of these equations simplifies to another linear equation, giving a system of linear equations easily solved.

  xy +y +2x + 2 -xy = 30

  2x +y = 28 . . . . . . . subtract 2

Dividing the first equation by 2 gives

  x +y = 18

and subtracting this from the above equation gives ...

  (2x +y) -(x +y) = 28 -18

  x = 10

Then

  y = 18 -10 = 8

The area of the original rectangle is xy = 10·8 = 80 m^2.

4 0
3 years ago
Please help me on this
Marrrta [24]
It's C x5 the correct answer I'm not sure
3 0
3 years ago
How many variable terms are in the expression 3x3y + 5x2 + y + 9?
Ratling [72]
Three variable terms appear in this expression. Although 9xy has two variables, they combine to make one term. 

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Like this answer? PM me for more awesome answers! - Boodle
7 0
3 years ago
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