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wolverine [178]
3 years ago
12

One month, Diane worked 6 hours more than Elle. Together they worked 20 hours. How many hours did Diane work? How many hours did

Elle work?​
Mathematics
1 answer:
harina [27]3 years ago
7 0
D = E + 6
D + E = 20
Plug in the first one in the second one.
E + 6 + E = 20
2E + 6 = 20
2E = 14
E = 7
D = 13
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Please help:))))))
Veronika [31]

Answer:

1. 6x^2 + 4x - 4y

2. x - 10y.

3. 6x^5

4.  36 a^6 b^8

5. x^2 - 81

6. 9x^2 - 42x + 49

7. 12x^2 +3x - 42


Step-by-step explanation:

1. 3x^2+4x+3x^2-4y

Add the like terms, we get

6x^2 + 4x - 4y


2. (5x-2y)-(4x+8y)

Now distribute the negative sign, we get

5x - 2y -4x -8y

Simplify the like terms, we get

x - 10y.


3. 3x^3(2x)^2

Multiply the numbers and simplify the variables

6x^(3 +2)

6x^5

4. (-6a^3b^4)^2

Now bring the power 2 inside the parenthesis.

-6^2 a^6 b^8

= 36a^6b^8


5. (x+9) (x-9)

x^2 + 9x -9x - 81

x^2 - 81


6. (3x-7)^2

(3x - 7)(3x - 7)

9x^2 - 21x -21x + 49

9x^2 - 42x + 49


7. (3x+6) (4x-7)

12x^2 + 24x -21x - 42

12x^2 +3x - 42

Thank you.

8 0
3 years ago
Melissa's homeroom raised 63% of its goal for the school fundraiser. Matt's homeroom has raised 48%. Create a situation in which
Contact [7]

Melissa's homeroom raised 63% of its goal for the school fundraiser. Matt's homeroom has raised 48%. Since it is a percentage of their goal, a situation in which Matts homeroom raised more money that Melissa's homeroom is when Matts goal is much bigger than melissas goal, so even if melissas has bigger percentage, matt has more money.

Example

Matts goal is 1000 so 1000*.48 = 480

Melissas goal is 500 so 500*.63 = 315

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3 years ago
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Trava [24]

Answer:

the value of s is 7.5 ...............

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The limit is 8 follow ups per day

The hospital has 8 hrs available for appointments

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X = Visits

Y = Follow-ups

And since her first visit and follow up equals to an hour and 30 mins, meaning for it to all add up into the 8 hrs for the appointment, it'll be... 1 hr, 30 mins/ 3 hrs/ 4 hrs, 30 mins/ 6 hrs/ 7 hrs, 30 mins/ <em>9 hrs</em>

Eight hours is the limit so that means it equals to 5 visits and 6 follow ups, due to if you want it to be the whole 8 hours.

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