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timofeeve [1]
4 years ago
14

Suma a trei numere este 30. Primul numar este de doua ori mai mare decat triplul celui de-al treilea numar si de doua ori mai ma

re decat al duilea numar. Care sunt numerele?
Mathematics
1 answer:
Sloan [31]4 years ago
4 0
 a + b + c = 30 ;
a = 6c ;
a = 2b ;

Then, c = a / 6 and b = a / 2 ;
a / 6 + a / 2 + a = 30 ;
a / 6 + 3a / 6 + 6a / 6 =  180 / 6 ;
10a = 180 ;
a = 18 ;
b = 9 ;
c = 3.

Good luck !

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2. QUIT WHILE YOU CAN Smoking has long been connected with serious diseases, such as lung cancer,
den301095 [7]

Using proportions, it is found that the life span of the person would be 14 years, 212 days and 22 hours shorter.

---------------------------

  • 2 packs a day for 35 years is 40 cigarettes a day for 12775 days, as 35 \times 365 = 12775.
  • Thus, a total of 511000 cigarettes, as 40 \times 12775 = 511000.
  • Assuming each cigarette costs 15 minutes of life, the person loses 7665000 minutes of life, as 15 \times 511000 = 7665000

  • One year has 525600 minutes, thus the person loses 14 years of life, as \frac{7665000}{525600} = 14.5833333
  • Looking at the decimal part, the person loses 212 days of life, as 0.5833333 \times 365 = 212.916666655
  • Again looking at the decimal part, 22 hours, as 0.916666655 \times 24 = 22

  • Thus, the person loses 14 years, 212 days and 22 hours of life.

A similar problem is given at brainly.com/question/23352001

6 0
2 years ago
Any idea on how to solve this?
hichkok12 [17]
If you are talking about finding the slope of BC then it looks like you have to find the square root of 3 which is approx 1.7 then find the slope.
slope equation is rise over run (or y over x): y1 + y2 divided by x1 + x2.
From this you should be able to find the answer
8 0
3 years ago
I need an equation from this question so I can graph and solve by substitution and elimination. The question the following,
hram777 [196]
16x+3y=251 and 8x+4y=148 then you set them up to each other and cancel one coefficient through elimination or find out what X or Y equals and substitute into either equation
6 0
3 years ago
Find the area of the figure. Round to the nearest tenth if necessary.
liberstina [14]

Answer:

  a.  26 units²

Step-by-step explanation:

The x-axis conveniently divides the figure into a triangle (above the x-axis) and a trapezoid (below the x-axis).

The top triangle has a base of 4 and a height of 3, so its area is ...

  triangle area = (1/2)(4 units)(3 units) = 6 units²

The bottom trapezoid has a top base of 4, a bottom base of 6, and a height of 4 units. Its area is ...

  trapezoid area = (1/2)(b1 +b2)h = (1/2)(4 units + 6 units)(4 units) = 20 units²

The total area of the figure is ...

  area = triangle area + trapezoid area = 6 units² + 20 units² = 26 units²

7 0
3 years ago
0.5x = 16 for x using the division property of equality.
Anna11 [10]

Answer:

32

Step-by-step explanation:

0.5x = 16

divide 0.5 from both sides to get variable by itself since it is the inverse operation of 0.5x

x=32

6 0
3 years ago
Read 2 more answers
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