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Alchen [17]
3 years ago
14

I need help simplifying problem 9 on practice

Mathematics
1 answer:
Alenkasestr [34]3 years ago
7 0

Answer:

−2x

Step-by-step explanation:

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−5x−1=<br> \,\,-2x+14<br> −2x+14
Scilla [17]

Answer:

yeaa this is hard but i will help u if i knew what the answer was srry ma g

Step-by-step explanation:

3 0
3 years ago
12=x+3 please help me out
valentina_108 [34]

Answer: x=9

12=x+3

-3     -3

9=x

7 0
3 years ago
Read 2 more answers
Please help me :)
Tatiana [17]
Answer: the line AB and the line CD are perpendicular lines.

Explanation:

The easiest way to work this question is with a graph done at scale.

I elaborated the attached graph with the points A, B, C, and D, and the lines AB, AC, AC, and BD.

The line AB is in red, the line AC is in organe, the line CD is in green, and the line BD is in blue.

From that graph, you can discard quickly some choices, which will avoid some calculations.

The basis to answer this question are:

1) The slopes of parallel lines are equal

2) The product of the slopes of perpendicular lines is - 1, which implies that one slope is the negative inverse of the other slope.

3) Formula to calculate the slope:

slope = rise / run = Δy / Δx

So, now you can analyze each statement:

Are the line AB and line CD perpendicular?

They might be, so we must either measure the angle to check if it is 90° or calculate the slopes. I will calculate the slopes:

line AB:

slope = run / rise = (y2 - y1) / (x2 - x1) = (4 - 1) / (-2 - (-8) ) = 3 / 6 = 1 / 2

line CD:

slope = run / rise = (y2 - y1) / (x2 - x1) = (5 - (-1) ) / (- 6 - (-3) ) = 6 / (-3) = - 2

Bingo! Those slopes are perpendicular, because 1/2 * (-2) = - 1.

So, the answer to the problem is the first option: line AB and line CD are perpendicular lines.

Clearly the second option is absurd (it is the negation of the first one), the third option is also false because it is also the negation of the first one, and if you want you can calculate the slopes of the lines AC and BD, but the figure shows that they are not parallel.



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4 0
3 years ago
Read 2 more answers
Do 2 ratios form a proportion???
frez [133]

They form a proportion when both of the ratios are equivalent.

An example: 3/15 and 1/5 is a proportion because the are equivalent.

The reason why they are equivalent is because if you cross multiply meaning doing 3*5 which equals 15 and 15*1 which equals 15 so basically you multiply the numerator by the other fractions denominator and do the same for the other side and see if the numbers are the same if they are not the same they are not a proportion if they are the same they are a proportion.

Hope this helps!

7 0
3 years ago
Read 2 more answers
9 to 81<br> What is 9 to 81 in simplest form
Step2247 [10]

Answer:

1 : 9

Step-by-step explanation:

9 : 81 ( for simplification, both numbers can be divided by 9)

1 : 9

3 0
3 years ago
Read 2 more answers
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