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hoa [83]
2 years ago
13

Twice m decreased by 11

Mathematics
1 answer:
iogann1982 [59]2 years ago
6 0

Answer:

2m - 11

Step-by-step explanation:

twice m = 2m

decreased by 11 = -11

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Trigonometry: If f(x)= 2sinx + cosx using exact values find f (120 degrees). if possible show steps.
Arada [10]

Answer: f(120°) = (√3) + 1/2

Step-by-step explanation:

i will solve it with notable relations, because using a calculator is cutting steps.

f(120°) = 2*sin(120°) + cos(120°)

           =2*sin(90° + 30°) + cos(90° + 30°)

here we can use the relations

cos(a + b) = cos(a)*cos(b) - sin(a)*sin(b)

sin(a + b) = cos(a)*sin(b) + cos(b)*sin(a)

then we have

f(120°) = 2*( cos(90°)*sin(30°) + cos(30°)*sin(90°)) +  cos(90°)*cos(30°) - sin(90°)*sin(30°)

and

cos(90°) = 0

sin(90°) = 1

cos(30°) = (√3)/2

sin(30°) = 1/2

We replace those values in the equation and get:

f(120°) = 2*( 0 +  (√3)/2) + 0 +  1/2 = (√3) + 1/2

3 0
3 years ago
Solve the system using elimination. *<br> 2x + 3y = - 10<br> -4x + 5y = -2<br> Your answer
sesenic [268]

Answer:

2x + 3y=-10 is incorrect (I think)

When you mulitply something with no negative you get something with no negative

Hope this helps :)

I AM HERE TO HELP >:D

8 0
3 years ago
Which of the following options is the last step in calculating your net worth?
mestny [16]

Answer:

Step-by-step explanation:

subtracting your liabilities from your assets

5 0
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Is -49 a rational number? please explain
aleksklad [387]
Yes, because a rational number is any number that can be expressed as a fraction a/b where a/b are both integers, but cannot be zero.
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2 years ago
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Mandarinka [93]

Answer:

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Step-by-step explanation:

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9 / 3 = 3, so 3 is the factor of increase.

Now we need to do 4 x 3 = 12

So, ? = 12

<em>Hope that helps!</em>

<em>-Sabrina</em>

8 0
3 years ago
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