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NeTakaya
3 years ago
15

Which expression is equivalent to (–3y – x) – (5y – 8x)?

Mathematics
2 answers:
8090 [49]3 years ago
8 0
The answer is 2y - 7x
Over [174]3 years ago
8 0

Answer:

2y - 7x

Step-by-step explanation:

Just took the test on edge

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2 sqrt of 3 times 3 sqrt of 15
bixtya [17]
The answer would be 40.2 I'm pretty sure I'm right. I hope I helped!
5 0
3 years ago
The graph shows the number of hours driven and the number of miles traveled.
Assoli18 [71]

Answer:

x is 4 when y is 180

y is 540 when x is 12

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
I don't know what I'm doing wrong here, can anyone help?
Novosadov [1.4K]

if you look at the part where the first part connects with the second part:

y = 5 if x < - 2

y = -2x + 1 if  -2 ≤ x < 1

we don't have a discontinuity there, so there shouldn't be a dot.

<h3></h3><h3>What is wrong with the graph?</h3>

When we graph over intervals like (a, b) or [a, b] or something like that, we use dots to define the end of the intervals, and to denote that the function ends abruptly or we have a jump.

In this case, you can see that between the end and the second part and the beginning of the third part there is a jump, so the use of dots is correct there, but if you look at the part where the first part connects with the second part:

y = 5 if x < - 2

y = -2x + 1 if  -2 ≤ x < 1

we don't have a discontinuity there, so there shouldn't be a dot.

That is the only error with the graph.

If you want to learn more about piecewise functions:

brainly.com/question/3628123

#SPJ1

8 0
2 years ago
Select all the properties of a right triangle.
Ainat [17]

Answer:

Sorry sis don't know the meaning

6 0
3 years ago
To estimate the height of a mountain, two students find the angle of elevation from a point (at ground level) b = 800 meters fro
Nady [450]

Answer: The height of the mountain is 1,331.4 meters (approximately)

Step-by-step explanation: From the information given, the students were standing at point b which is 800 meters from the base of the mountain and the angle of elevation from that point is 59°. Assuming that the ground is level, we can derive a right angled triangle from this set of details and hence we have triangle ABC, where angle β is the reference angle, (59 degrees), BC is the distance from the students to the base of the mountain (800 meters) and the line AC is the height of the mountain.

The line AC is the opposite, since angle B is the reference angle, therefore we shall use the trigonometric ratio as follows;

Tan β = opposite/adjacent

Tan 59 = AC/800

Tan 59 x 800 = AC

1.6643 x 800 = AC

1331.44 = AC

AC ≈ 1331.4

Therefore the height of the mountain is approximately 1,331.4 meters

6 0
3 years ago
Read 2 more answers
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