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Ostrovityanka [42]
3 years ago
12

Simplify the following cos(-x)tanx

Mathematics
1 answer:
RSB [31]3 years ago
8 0
\bf \textit{symmetry identites}\\\\
cos(-\theta)=cos(\theta)\\\\
-----------------------------\\\\
cos(-x)tan(x)\implies cos(-x)\cdot \cfrac{sin(x)}{cos(x)}\\\\\\ cos(x)\cdot \cfrac{sin(x)}{cos(x)}\implies sin(x)
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Marly gets 5 gems every 5 minutes. If Marely has 180 gems, how many minutes have passed?
Sloan [31]
Find out how many gems Marly can get in a minute.

5 gems = 5 minutes

1 gems = 5 divided by 5 = 1 minute

180 gems = 1 x 180 = 180 minutes

180 minutes have passed.



7 0
3 years ago
Read 2 more answers
What are the solutions to the system of equations,<br> y=x+21<br> 2x+y=57
kondaur [170]

Answer:

(12,33)

Step-by-step explanation:

This system can be solved using the substitution method. This is where you replace one variable by another.

Step 1:

Plug in x+21 for the y

Step 2:

Combine like terms

2x+x+21=57\\3x+21=57

Step 3:

Subtract 21 from both sides

3x=36

Step 4:

Divide both sides by 3

x=12

Step 5:

Use the first equation and plug in 12 for x

y=12+21

y=33

Step 6:

Proof of work

2(12)+33=57\\24+33=57\\57=57

3 0
3 years ago
Ax + bx - 15 = 0;x<br> How do you solve this?
Pani-rosa [81]

Answer:

Step-by-step explanation:

ax+bx-15=0\\=> (a+b)x-15=0\\=>(a+b)x=15\\=>x=\frac{15}{(a+b)}

7 0
3 years ago
Help!! 3820 divided by 5
Mnenie [13.5K]

Answer: 764


Step-by-step explanation:


5 0
3 years ago
Read 2 more answers
Choose the equation that is the standard form of
Ronch [10]
For this case we have the following equations:
 5y = 3-2x
 5y-3 = -2x
 2x + 5y = 3
 2x + 5y-3 = 0
 The standard form of the equations is given by:
 Ax + By = C
 Therefore, the equation written in its standard form is:
 2x + 5y = 3
 Where,
 A = 2
 B = 5
 C = 3
 Answer:
 
The equation that is the standard form is:
 
2x + 5y = 3
7 0
3 years ago
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