3 years ago

Solve algebraically, the system of equations, please and thank you!

Mathematics

1 answer:

Masja [62]3 years ago

6 0

Answer:

So x should equal 1/2, and y should equal -1.

Hope this helps :)

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X - (4x - 7) = 5x - (x + 21)

maksim [4K]

$x-(4x-7)=5x-(x+21)\ \ \ \ | omit\ the\ brackets\\\\
x-4x+7=5x-x-21\\\\
-3x+7=4x-21\ \ \ | subtract\ 4x\\\\
-7x+7=-21\ \ \ | subtract\ 7\\\\
-7x=-28\ \ \ | divide\ by\ -7\\\\
x=4$

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4 years ago

Which expression is equivalent to sin(2x) cosx

Vsevolod [243]

Answer:

$2sin(x)cos^2(x)$

Step-by-step explanation:

To solve the problem, you must expand the trigonometric expression using the information given.

$sin(2x)cosx\\sin(2x)\\=2sin(x)\\=2sin(x)cos^2(x)$

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2 years ago

At a local gym, 10 of the 40 trainers currently have CPR certification. Next year, the gym plans to have 46 trainers, and the ow

notsponge [240]

I think that the answer should be B.

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4 years ago

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Illusion [34]

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triangular prisim

Step-by-step explanation:

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If 4/5=4×1/5then 5/12=

-BARSIC- [3]

Then 5/12=5×1/12

I hope this helped :)
if not, please leave a comment below

4 0

3 years ago