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mezya [45]
3 years ago
9

The sum of four times a number and five times another number is -28. The sum of nine times the first number and two times the se

cond number is 11. What is the second number?
Mathematics
1 answer:
dedylja [7]3 years ago
7 0

Answer:

  -8

Step-by-step explanation:

If we let x and y represent the first and second numbers, respectively, we can write the problem statement as the equations ...

  • 4x +5y = -28
  • 9x +2y = 11

We can multiply the first equation by -9 and add 4 times the second equation to get an equation in y alone:

  -9(4x +5y) +4(9x +2y) = -9(-28) +4(11)

  -37y = 296 . . . . . simplify

  296/-37 = y = -8 . . . . . divide by the coefficient of y

The second number is -8.

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4, 02, 03, α4, 28.<br> Find the common difference
hram777 [196]

Answer:

1

Step-by-step explanation:

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5 0
3 years ago
A certain jet can reach an altitude of 8000 ft while flying 16000 ft through the air. what is the angle of the elevation that th
irina1246 [14]

Answer:

27 degrees

Step-by-step explanation:

First, we can draw this out. Since the altitude is 8000, we can make that the height, and it goes 16000 feet through the air, that can be the length. I have drawn this out, as shown in the image. Note that when drawing, because the airplane is going up and forward, that path should represent the hypotenuse. The angle of elevation is the angle connecting the length and the path, as shown by the angle x in the picture.

We know than tan(x) = opposite/adjacent, so tan(x) here = 8000/16000 = 1/2. Then, arctan(1/2) =x = 27 degrees

4 0
3 years ago
. The cost of 2 pizzas and 1 burger is ₹ 450. Write a linear equation for this situation and draw its graph.​
Akimi4 [234]

Answer:

The linear equation is;

Y = 450 - 2·X

Please find the included graph

Step-by-step explanation:

Whereby we have the following relation;

The cost of 1 pizza = X

The cost of 1 burger = Y

Hence;

450 = Y + 2·X

Which gives;

Y = 450 - 2·X

The linear equation for the situation is therefore as presented above

The graph of the linear equation can be plotted using the assumed data as follows;

Y,           X

1,           448

2,          446

3,         444

4,          442

5,          440

6,          438

7,          436

8,          434

9,          432

10,          430

11,          428

12,          426

13,          424

14,          422

15,          420

16,            418

8 0
2 years ago
Question 1 (1 point)
bearhunter [10]
It’s is b why u covering your camera lol
4 0
3 years ago
Place the fractions 3 7 , 1 3 , 2 5 , and 3 8 in order from least to greatest.
eimsori [14]

Answer:

1/3,  3/8,  2/5,  3/7

Step-by-step explanation:

3/7 \approx 0.42857142857

1/3 \approx 0.33333333333

2/5 = 0.4

3/8 = 0.375

4 0
3 years ago
Read 2 more answers
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