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VashaNatasha [74]
3 years ago
10

Listen just answer I neeed help, but I don’t

Mathematics
1 answer:
adelina 88 [10]3 years ago
5 0

Answer:

look below

Step-by-step explanation:

I'll go in order from top to bottom

5\frac{2}{3}

1\frac{5}{9}

6\frac{1}{2}

6\frac{1}{3}

5\frac{1}{2}

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Grayson can read 18 pages of a book in 30 minutes. At that rate, how long would it take Grayson to read 150 pages? Express your
ratelena [41]

Answer:

4 hours and 10 min

Step-by-step explanation:

For this equation we will do ratios:

\frac{18}{30} =\frac{150}{x} \\\\18x=4500\\x=250

250 min =

4 hours and 10 min

4(60) = 240

240 + 10 = 250 minutes

6 0
3 years ago
What are the answers for these 11, 14, 15, 16 and 20.
Vesna [10]

Answer:

11. (x, y) -> (7, -3)

14. (x, y) -> (-3, -2)

15. (x, y) -> (-3, 2)

16. (x, y) -> (7,6)

20.(x, y) -> (4, 1)

Step-by-step explanation:

11.

x + 3y = 1

-3x -3y = -15

-2x = -14

/-2    /-2

x = 7

x + 3y = 1

7 + 3y = 1

-7        -7

3y = -6

/3    /3

y = -2

(x, y) -> (7, -3)

14.

-3x + 3y = 3

-5x + y = 13

-5x + y = 13

+5x     +5x

y = 5x + 13

-3x + 3(5x + 13) = 3

-3x + 15x + 39 = 3

12x + 39 = 3

    - 39   -39

12x = -36

/12    /12

x = -3

Now, we solve for y:

-5x + y = 13

-5(-3) + y = 13

15 + y = 13

-15      -15

y = -2

(x, y) -> (-3, -2)

15.

6x + 6y = -6

5x + y = -13

5x + y = -13

-5x         -5x

y = -5x - 13

6x + 6y = -6

6x + 6(-5x - 13) = -6

6x -30x - 78 = -6

-24x - 78 = -6

       + 78  + 78

-24x = 72

/-24     /-24

x = -3

Now, we solve for y:

6x + 6y = -6

6x + 6y = -6

6(-3) + 6y = -6

-18 + 6y = -6

+18       +18

6y = 12

/6   /6

y = 2

(x, y) -> (-3, 2)

16.

2x + y = 20

6x - 5y = 12

2x + y = 20

-2x     -2x

y = -2x + 20

6x - 5y = 12

6x - 5(-2x + 20) = 12

6x + 10x - 100 = 12

16x - 100 = 12

    + 100  +100

16x = 112

/16    /16

x = 7

Now, we solve for y:

2x + y = 20

2(7) + y = 20

14 + y = 20

-14      -14

y = 6

(x, y) -> (7,6)

20.

-2x - y = -9

5x - 2y = 18

-2x - y = -9

+2x     +2x

-y = 2x - 9

/-1    /-1

y = -2x + 9

5x -2y = 18

5x - 2(-2x + 9) = 18

5x + 4x - 18 = 18

9x - 18 = 18

   + 18   + 18

9x = 36

/9  /9

x = 4

Now, we solve for y:

-2(4) - y = -9

-8 - y = -9

+ 8     +8

-y = -1

/-1  /-1

y = 1

(x, y) -> (4, 1)

Hope this helps!

6 0
2 years ago
What number is not a common multiple of 3 and 8?
serious [3.7K]
24


The least common multiple
of 3 and 8 is 24.
7 0
3 years ago
Read 2 more answers
You tried to get every semi truck to honk but only 7 did what fraction if semi trucks you saw honked
Anton [14]

Answer:

I am so lost but if it's how many honk out of how many you saw I would assume 7/7

5 0
3 years ago
A student has scores of 73, 75, and 84 on his first three tests. He needs an average of at least 80 to earn a grade of B in the
Nesterboy [21]

Answer:

88%

Step-by-step explanation:

(73+75+84+x)/4=80

x4 to both sides

73+75+84+x=80x4

73+75+84+x=320

232+x=320

x=320-232

x=88

6 0
2 years ago
Read 2 more answers
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