2 years ago

Please help me with questions 11-13 god bless

Mathematics

1 answer:

lianna [129]2 years ago

5 0

#11 and #12 have no solutions, #13 has a solution which is 14

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1/7 of all students achieved great success in the written exercise in mathematics. 3/7 very good success. 2/7 good success, whil

laila [671]

Answer:

x = 28

Step-by-step explanation:

Let the total number of students = x

x/7 + 3x/7 + 2x/7 + 4 = x If that is all there is. If it isn't the problem can't be done. Combine like terms.

x(1 + 3 + 2)/7 + 4 = x

x (6/7) + 4 = x Subtract 6x/7 from both sides

4 = x - 6x/7

4 = 7x/7 - 6x/7 Combine

4 = 1/7x Multiply both sides by 7

4*7 = 7x / 7

x = 28

6 0

2 years ago

This is hard, but I really need help!

sukhopar [10]

Please see pic, I'd solved in it.

4 0

3 years ago

On a coordinate plane, the coordinates of vertices R and T for a polygon are R(−6, 2) and T(1, 2). What is the length of Side RT

andriy [413]

Answer : 7 units

There are two ways you can solve this problem:

1st way - Subtract the T's x coordinate by r's x coordinate.

1-(-6) = 1+6 = 7

2nd way - Graph the points than count the units between them.

[I attached a picture, I graphed ur points]