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3 years ago

How to solve this? Don't just give me the answer help me learn this.

Mathematics

1 answer:

Sphinxa [80]3 years ago

6 0

Answer:

I'm not entirely sure but I think that what is says is that it wants you to find the value of x in (4x+28) to make it 116 degrees because it is that same angle. So what you do is you get (4x+28)=116 and you do this because they are the same angle so you use 116 and get it to solve x. Since I'm lazy, then I go to this website and type the equation in: m a t h w a y . c o m but without all of the spaces, I had to do that so it would let me answer this, but I'll do it the real way this time. (4x+28)=116 Their is a rule in math that as long as you do something to one side of the equal sign in the equation, you have to do it to the other and it will still work. So, you minus 28 from both sides so that you can get rid of it and you now have 4x=88. Now you should know this part but you divide 4 from both sides to make so x is alone. Now you have x=22 because you divided 4 from each side. So their is your answer: x=22.

Step-by-step explanation: If you have the answer key that you can check from to make sure you got it right because I know some teachers let you do that, then you should make sure that is right, but I am pretty sure it is.

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Unit 6: Periodic Functions and Trigonometry

Goshia [24]

Answer:

#1) A. 4; #2) A. periodic; about 6; #3) B. not periodic; #4) C. 2; 0.5; #5) A. 0.05 seconds; 4.5.

Explanation:

#1) The period of a function is essentially the amount of time it takes for the function to start all over and repeat itself. In this function, at t = 0 the graph is at 1; it curves up, back down and begins again at y=1 when t=4. This means the period goes from t=0 to t=4, so it is 4.

#2) Looking at the left side of the graph, specifically the peak at (-5, 2), we see the same peak at about (1, 2). Following the graph after that we can see that it does indeed repeat itself; this means the period goes from t= - 5 to t = 1, so it is 6.

#3) This function never repeats, so it is not periodic.

#4) This function repeats when it reaches t=2, so 2 is the period. The amplitude is the distance from the center line (of the graph, not the x-axis) to the peak. The center line would be located at about y=0.5; the peaks are at y=-1. This means the amplitude is 0.5.

#5) This function repeats every 0.05 seconds. In this case, the center line is the x-axis; the distance from it to any peak is 4.5, so 4.5 is the amplitude.

3 0

4 years ago

Read 2 more answers

How many solutions does 3y = 9x - 6 -9x + 3y= - 6

butalik [34]

Answer:

X=2/3 y=0

X=-1/3 y=-3

Step-by-step explanation:

Thats the answer

3 0

3 years ago

What are the vertex and x-intercepts of the graph of y=(x-4)(x+2)?

11Alexandr11 [23.1K]

Answer:

A. x-intercepts: (4,0),(-2,0)

C. Vertex: (1,-9)

Step-by-step explanation:

We have been given factored form of a quadratic equation $y=(x-4)(x+2)$ . We are asked to find vertex and x-intercepts of our given equation.

We know that x-intercepts of a graph are those points at which graph touches or crosses x-axis and y-coordinates of x-intercepts are always zero.

So we will substitute $y=0$ in our given equation to find the x-intercepts.

$0=(x-4)(x+2)$

$(x-4)=0\text{ or }(x+2)=0$

$x-4+4=0+4\text{ or }x+2-2=0-2$

$x=4\text{ or }x=-2$

Since y-coordinates of x-intercepts will be 0, therefore, x-intercepts of the graph will be (4,0), (-2,0) and option A is the correct choice.

To find the vertex of the parabola, we will expand our given expression using FOIL.

$(x-4)(x+2)$

$x*x+x*2-4*x-4*2$

$x^2+2x-4x-8$

$x^2-2x-8$

We will use formula $\frac{-b}{2a}$ to find the x-coordinate of vertex of parabola, where, a and b represents the coefficient of $x^2\text{ and }x$ respectively.