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Margarita [4]
3 years ago
8

If a number is added to twice the number the result is -9 what is the number

Mathematics
2 answers:
Licemer1 [7]3 years ago
7 0

Answer:

the number is added to twice number is 99

PIT_PIT [208]3 years ago
4 0

Answer:

x + 2x=-9

3x= -9

x=-3

Step-by-step explanation:

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A rope to length 30m is divided in the ratio 2:3. calculate the length of the longest
Vlada [557]

longest part = 18 m

add the parts of the ratio 2 + 3 = 5

divide 30 by 5 to find the value of 1 part of the ratio

\frac{30}{5} = 6 ← 1 part

2 parts = 2 × 6 = 12 m

3 parts = 3 × 6 = 18 m ← longest part


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3 years ago
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Solve <br> x2 + x - 56 = 0
kolbaska11 [484]

The answer would be 2x1=x so x would be 2

Step-by-step explanation:

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I need this rn please and ty
Harlamova29_29 [7]

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A. 22.5

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4 0
3 years ago
Two schools had a track and field competition. One school took 3,784 students. The other school
kati45 [8]

Answer:

4527

Step-by-step explanation:

total amount students = 4527+1641

=6168

amount of students who did not win a medal = total - amount who won a medal

= 6168-1641

=4527

3 0
3 years ago
18. El equipo de docentes del Área de Formación Humanística decide repartir 195 ejemplares de libros de lectura a 4 estudiantes
irina [24]

Answer:

Each of the students absent for 1, 2, 4 and 5 days get 57, 53, 45 and 40 copies of the the reading books respectively.

Step-by-step explanation:

English Translation

The team of teachers from the Humanistic Training Area decides to distribute 195 copies of reading books to 4 students previously classified on their own merits. But the distribution will be made taking into account absences from classes during the first cycle. How many books does each student receive if their absences have been 1; two; 4 and 5 days, respectively?

Solution

Because the more the number of days absent, the less the number of books each of the 4 students deserve, we have to employ an elaborate scheme.

If 195 copies are distributed equally between 4 People, each person gets 48.75 copies of the books.

Now, if we add another 48.75 copies of books to the total number of books, each person gets 60.9375 books.

But, we can then divide 48.75 extra books on top according to the number of days absent and subtract each person's number from the assumed 60.9375 books, with an extra 48.75 books.

Total number of days absent = 1 + 2 + 4 +5 = 12

(48.75/12) = -4.0625 copies for each absent day.

The student with only 1 absent day gets 60.9375 - 4.0625 = 56.875 copies = 57 copies

The student with 2 absent days, gets = 60.9375 - (2×4.0625) = 52.8125 copies = 53 copies

The student with 4 absent days, gets = 60.9375 - (4×4.0625) = 44.6875 copies = 45 copies

The student with 5 absent days, gets = 60.9375 - (5×4.0625) = 40.425 copies = 40 copies

Hence, each of the students absent for 1, 2, 4 and 5 days get 57, 53, 45 and 40 copies of the the reading books respectively.

Hope this Helps!!!

6 0
3 years ago
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