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Over [174]
3 years ago
12

Pls help and explain

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
7 0

Answer:  x(7 - 2)    <em>none of the answer choices are correct</em>

<u>Step-by-step explanation:</u>

7x + (-2x)

= 7x - 2x       (opposite signs changes to a negative sign)

factor out an x:

= x(7 - 2)

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Prove the following identity true. Show work.
yulyashka [42]

Answer:

The  Pythagorean identity states that

\sin^2 t + \cos^2 t = 1

Using that we can rewrite the left denominator as:

1 - \sin^2 t

Which can be factored as

(1 - \sin t)(1+ \sin t)

The numerator we can expand as:

(1 - \sin t)(1 - \sin t)

On the right hand side, let's multply numerator and denominator with (1 - sin t):

The total formula then becomes:

\dfrac{(1-\sin t)(1-\sin t)}{(1 - \sin t)(1 + \sin t)} = \dfrac{(1-\sin t)(1 - \sin t)}{(1+\sin t)(1 - \sin t)}

There you go... left and right are equal.

3 0
3 years ago
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Which of these pairs of events are dependent?
Pani-rosa [81]

Answer:

the first one

Step-by-step explanation:

8 0
3 years ago
HELP PLEASE!! this is 8th grade math btw
natima [27]

Answer:

the 2nd one

Step-by-step explanation:

5 0
3 years ago
Solve the following problems:<br> Find x, y
vladimir1956 [14]

Answer:

x=1.25, y=1.75

Step-by-step explanation:

The two triangles formed (one triangle with side lengths of 5, 7, 8 and another with sides 5+x, 10, and 7+y) are similar, because they share the same angle measures.

Now, 2 sides given that we can compare ratios with are the side with length 8, and the side with length 10. 10/8= 1.25, which is the ratio of the sides on these 2 triangles.

Now we want to find what the side '5+x' is equal to. To do that we can use our  ratio, and multiply 5 by 1.25 to find '5+x'. This is 6.25. To find x, all we need to do is subtract 5 from 6.25, which is 1.25.

Let's find y now. Do the same thing that we did with the side '5+x'; find what '7+y' is by multiplying 7 by 1.25, which is 8.75. 8.75-7= 1.75.

Hope this helps! :)

8 0
3 years ago
Enter the correct answer in the box. Simplify the expression (6^2)^4
jekas [21]

Answer:

6^8 or 1679616

Step-by-step explanation:

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3 years ago
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