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Kisachek [45]
2 years ago
12

Which expression is equivalent to -30 - 8x + 50 - 2x?

Mathematics
2 answers:
Makovka662 [10]2 years ago
6 0

-10x + 20 should be the right answer.

katen-ka-za [31]2 years ago
3 0

Answer:

20-10x

Step-by-step explanation:

-30+50=20

-8+ (-2x)= -10x

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Given that sin 2x = cos(2x - 30). Find the value of tan x.​
Paul [167]

Answer:

x=30o+n90on∈Z

Step-by-step explanation:

cos2x=sin(90o−2x)=sin(2x−30o)

Which mean 90o−2x=2x−30o+n360o

or 90o−2x+2x−30o=(2n+1)180o

The later cannot be true.

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4 0
3 years ago
Read 2 more answers
-13x=90-2y <br> -6x=48-2y
Kisachek [45]

While it's pretty obvious to most of us that


-13x=90-2y

-6x=48-2y


is a system of linear equations, it'd be well to include that info plus the instructions "solve this system of linear equations."


Subtract the 2nd equation from the first:


-13x=90-2y

+6x=-48+2y

-----------------------

-7x = 42. Then x = -42/7, or x = 6.


Now subst. 6 for x in either one of the given equations. Suppose we use the 2nd equation:


-6x=48-2y


Then -6(6)=48-2y, or -36 = 48 - 2y, or 2y = 48+ 36 = 84. Then y = 42.


The solution is (6, 42).

3 0
2 years ago
Need help for geometry.
polet [3.4K]

Answer: The first.

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3 years ago
Find the amount on 800 for one year at 10%​
Rudiy27

Answer:

80

Step-by-step explanation:

You mean the "interest on"

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At city community college, every freshman must take English 101. The English department wants to know whether students who take
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