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vladimir1956 [14]
4 years ago
13

Which of the following systems of equations has no solution?

Mathematics
2 answers:
UkoKoshka [18]4 years ago
8 0
The system of equations that has no solution are the equations that has the same slope which means they are parallel and do not intersect with each other at any point. From the choices, the correct answer is option D.
<span>
</span><span> 7y = 5x − 10
y = (5/7) - 10/7
slope = 5/7

10x − 14y = 8</span>
-14y = -10x + 8
y = (5/7) - 4/7
slope = 5/7
Law Incorporation [45]4 years ago
7 0
For option d:
5x - 7y = 10 . . . . . (1)
10x - 14y = 8 . . . . (2)

(1) x 2 => 10x - 14y = 20 . . . . . (3)

(2) - (3) => 0 = -14              [not possible]

Therefore, the set of equations in option d, has no solutions.
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The distance from the Earth to the moon is about 239,000 miles. Rewrite the distance in scientific notation.
egoroff_w [7]

Answer:

2.39 x 10^5 miles

Step-by-step explanation:

Although it is not usually written, there is always a .0 at the end of a number unless there is a specific decimal that was given.

So, the number here is 239,000.0 and if you count the number of spaces that the decimal needs to move in order to be in the correct spot for scientific notation (which is always after the first number), there is 5 spaces.

Therefore the answer is 2.39 x 10^5 miles.

4 0
2 years ago
A car travels 30 1/5 miles in 2/3 of an hour. Whwt is the average speed, in miles per hour, of the car​
LiRa [457]

Answer:

45 3/10 mph

Step-by-step explanation:

30 1/5 /2 = 15 1/10

15 1/10 x 3 = 45 3/10 mph

8 0
3 years ago
Write the slope-intercept equation
satela [25.4K]

Answer:

ok so I think it's -3:3

Step-by-step explanation:

hopefully thats right

8 0
3 years ago
Need help ASAP I tried to do the problem but I don't know how
inysia [295]

Answer:

  see below

Step-by-step explanation:

(a) the graph is symmetrical about the horizontal axis. It has a maximum value of r = 3 at θ = π.

__

(b) The graph is symmetrical about both the horizontal and the vertical axis. It has a maximum value of r = 1 at θ = 0 and θ = π. (Note this curve has subtle differences from the inner loop of the above curve.)

_____

<em>About how</em>

As with any graphing problem, when doing it by hand, one chooses enough points to give the general shape of the curve. In some cases, quite a few points may be required. It is often helpful to use a spreadsheet for calculating the point values. Here, we've graphed the equations using "technology"--a graphing calculator.

7 0
3 years ago
The area of Australia is approximately 7.7 x 10^6 km. If it were to be divided into states of about 1.54 x 10^6 km, how many sta
Goshia [24]

Answer:

5

7.7 x 10^6 / 1.54 x 10^6

note that the 10^6 / 10^6 cancles out (gets to *1 or rather /1)

7.7 / 1.54 is exactly 5

8 0
3 years ago
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