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3 years ago

How do you solve this problem step by step? 3(x+1)+6=-9

Mathematics

2 answers:

OLEGan [10]3 years ago

7 0

Answer:

X= -7

Step-by-step explanation:

see photo for how I did it

Step2247 [10]3 years ago

4 0

Answer:

distribute the 3 and the x then add 1 after you do that put 3x + 3 then bring down the +6 = -9

Step-by-step explanation:

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F(x) = -3x^2 + 6x. Find f(2).

inysia [295]

Answer:

f(2) = 0

Step-by-step explanation:

Evaluate the function at x = 2.

f(x) = -3x^2 + 6x

f(2) = -3(2^2) + 6 * 2

f(2) = -3(4) + 12

f(2) = 0

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3 years ago

Create an expression that simplifies to sin x

Dimas [21]

Answer:

$2\cdot \sin 0.5x \cdot \cos 0.5x$

Step-by-step explanation:

Here is one example:

$2\cdot \sin 0.5x \cdot \cos 0.5x$

$\sin 0.5x \cdot \cos 0.5x + \cos 0.5x\cdot \sin 0.5x$

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3 years ago

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mote1985 [20]

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3 years ago

Which is an example of an incremental approach to solving a problem? writing the program code of the solution informally represe

Setler [38]

Answer:

writing the steps of a solution in small pieces of code

Step-by-step explanation:

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3 years ago

If a scalene triangle has its measures 4 m, 11 m and 8 m, find the largest angle.

soldier1979 [14.2K]

Answer:

129.8 approximately

Step-by-step explanation:

So this sounds like a problem for the Law of Cosines. The largest angle is always opposite the largest side in a triangle.

So 11 is the largest side so the angle opposite to it is what we are trying to find. Let's call that angle, X.

My math is case sensitive.

X is the angle opposite to the side x.

Law of cosines formula is:

$x^2=a^2+b^2-2ab \cos(X)$

So we are looking for X.

We know x=11, a=4, and b=8 (it didn't matter if you called b=4 and a=8).

$11^2=4^2+8^2-2(4)(8)\cos(X)$

$121=16+64-64\cos(X)$

$121=80-64\cos(X)$

Subtract 80 on both sides:

$121-80=-64\cos(X)$

$41=-64\cos(X)$

Divide both sides by -64:

$\frac{41}{-64}=\cos(X)$

Now do the inverse of cosine of both sides or just arccos( )

[these are same thing]

$\arccos(\frac{-41}{64})=X$

Time for the calculator:

X=129.8 approximately

3 0

4 years ago