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2 years ago

10

Sin(5x) cos(3x)-1/2sin(8x) = sin(x) cos(x)

1 answer:

aleksandrvk [35]2 years ago

7 0

Answer:

x=70

Step-by-step explanation:

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What is greater -2/3 or -0.8

alekssr [168]

Answer:

-2/3, I'm Sorry If The Answer Is Wrong, However I'm Trying

Step-by-step explanation:

8 0

2 years ago

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What are the solutions of the following system

noname [10]

Answer:

<h2>(-6, 312), (6, 312)</h2>

Step-by-step explanation:

$\left\{\begin{array}{ccc}10x^2-y=48\\2y=16x^2+48&\text{subtracy}\ 16x^2\ \text{from both sides}\end{array}\right\\\\\left\{\begin{array}{ccc}10x^2-y=48\\-16x^2+2y=48&\text{divide both sides by 2}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}10x^2-y=48\\-8x^2+y=24\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad2x^2=72\qquad\text{divide both sides by 2}\\.\qquad x^2=36\to x=\pm\sqrt{36}\\.\qquad x=\pm6\\\\\text{Put the values of}\ x\ \text{to the second equation}$

$2y=16(\pm6)^2+48\\\\2y=16(36)+48\\2y=576+48\\2y=624\qquad\text{divide both sides by 2}\\y=312$

6 0

2 years ago

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6th grade help please

miv72 [106K]

12 + 6x + 6x + 6y = 12 + 12x + 6y

8 0

2 years ago

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4 less than half a number is equal to 2 more than the number

xxMikexx [17]

Answer:

$-12$

Step-by-step explanation:

Let that number be $x$ . We can build an equation, and solve for $x$ .

$4$ less than half of $x$ is $x/2-4$ .

$2$ more than $x$ is $x+2$ .

We are given that the two quantities are equal, so we have that $x/2-4=x+2$ .

Adding $4$ to both sides gives $x/2=x+6$ .

Multiplying both sides by $2$ gives $x=2(x+6)=2x+12$ .

Subtracting $2x$ from both sides gives $-x=12$ .

Multiplying both sides by $-1$ gives $x=-12$ .

So, the number is $\boxed{-12}$ and we're done!

The check is left as an exercise to the reader.

3 0

2 years ago

ABC~DEF. ABC has a perimeter of 18 and a leg of 5. The base of DEF is 34.4. What is the perimeter of DEF.

zaharov [31]

Answer:

DEF =77.4 inches I attached an answer sheet so you can know how to work out the problem

3 0

2 years ago