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IRISSAK [1]
3 years ago
8

Mrs. Kramer bought some markers at the school supply

Mathematics
2 answers:
zzz [600]3 years ago
6 0

Answer:

10

Step-by-step explanation:

80%=8markers which were black

so 100%will be equal to what

so equate 80%=8

100%=?

100×8/80

=10 am not sure but I think it's like that

Phoenix [80]3 years ago
3 0

Answer:10

Step-by-step explanation:

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write the number with the least value using the digits 1 through 9. use each digit only once. explain your reasoning
Lady bird [3.3K]

Answer: 123456789

Step-by-step explanation:

We need to write a 9-digit number using the digits 1, 2, 3, 4, 5, 6, 7, 8, and 9.

(where we can use each digit only one time)

We want the value of this 9-digit to be the smallest as possible, then:

The largest single value digit (9), needs to be in the smallest value place (in the units place)

The second larger digit (8), must be in the second smallest value place (in the tens)

And so on, then the 9-digit number will be something like:

123456789

Any other permutation will be larger than this number.

8 0
3 years ago
The principle of work states that the ratio of work output to work input is always:
kow [346]

Answer:

work output is always less than work input - the ratio is less than 1.

Step-by-step explanation:

This principle comes from the fact that a machine or system cannot produce more work than is supplied to it, because this would violate the energy conservation law (work is a type of mechanical energy).

In theoretical machines called "ideal machines" the input work is the same as the output work, but these machines are only theoretical because in real applications there is always some type of energy loss, either in heat produced by a machine or processes for its operation, for this reason the output work is always less than the input work.

Regarding the ratio work output to work input:

WO/WI<1

because work input WI is always greater than work output WO.

3 0
3 years ago
Read 2 more answers
Factor the expression completely
Elodia [21]

Answer:

Factor the expression completely would be A -2.25(4.5+x)

Step-by-step explanation:

-2.25*3= -6.75 and -2.25*x= -2.25x

then the answer of  -6.75+2.25x

Hope this Helps and have a great day!

5 0
3 years ago
Please help me i dont understand this
DIA [1.3K]

Answer:

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6 0
2 years ago
Find the m of
zzz [600]

          Both of these problems will be solved in a similar way, but with different numbers. First, we set up an equation with the values given. Then, we solve. Lastly, we plug into the original expressions to solve for the angles.

[23] ABD = 42°, DBC = 35°

(4x - 2) + (3x + 2) = 77°

4x+ 3x + 2 - 2  = 77°

4x+ 3x= 77°

7x= 77°

x= 11°

-

ABD = (4x - 2) = (4(11°) - 2) = 44° - 2 = 42°

DBC = (3x + 2) = (3(11°) + 2) = 33° + 2 = 35°

[24] ABD = 62°, DBC = 78°

(4x - 8) + (4x + 8) = 140°

4x + 4x + 8 - 8 = 140°

4x + 4x = 140°

8x = 140°

8x = 140°

x = 17.5°

-

ABD = (4x - 8) = (4(17.5°) - 8) = 70° - 8° = 62°

DBC =(4x + 8) = (4(17.5°) + 8) = 70° + 8° = 78°

6 0
2 years ago
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