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SCORPION-xisa [38]
3 years ago
13

SOS I'm terrible at math.

Mathematics
1 answer:
Tresset [83]3 years ago
5 0
<span>y = -5 cos x is a basic (simple) variation of the basic trig function y = cos x.

The given </span>y = -5 cos x could be re-written as <span>y = -5 cos 1x.
Compare this to the most general form:          y =  a cos bx.

Here we see that the coefficient b equals 1.

There is a rule for finding the period of such a function:  Period = 2pi/b.

Since b = 1 here, the Period here is 2pi/1, or simply 2pi.

Please stop saying "I'm terrible with math."  That does not help you at all.  Say, instead, "With just a little help I could understand this just fine."</span>
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Can somebody plz help answer these questions correctly (only if u know how) thanks ! :D
cricket20 [7]

Answer:

21. 12

22. 42

23. 15

24. 6

25. 12

26. 24

6 0
2 years ago
Read 2 more answers
The Perimeter of the park is 318 m. Determine the length of the park.
Bond [772]

Answer:

Step-by-step explanation:

h=-5t²+135

when t=3 s

h=-5(3)²+135=-45+135=90 m

4 0
3 years ago
Write the equation of a parabola having the vertex (1, −2) and containing the point (3, 6) in vertex form. Then, rewrite the equ
In-s [12.5K]
PART A

The equation of the parabola in vertex form is given by the formula,

y - k = a {(x - h)}^{2}

where

(h,k)=(1,-2)

is the vertex of the parabola.

We substitute these values to obtain,


y  + 2 = a {(x - 1)}^{2}

The point, (3,6) lies on the parabola.

It must therefore satisfy its equation.


6  + 2 = a {(3 - 1)}^{2}


8= a {(2)}^{2}


8=4a


a = 2
Hence the equation of the parabola in vertex form is


y  + 2 = 2 {(x - 1)}^{2}


PART B

To obtain the equation of the parabola in standard form, we expand the vertex form of the equation.

y  + 2 = 2{(x - 1)}^{2}

This implies that

y + 2 = 2(x - 1)(x - 1)


We expand to obtain,


y + 2 = 2( {x}^{2}  - 2x + 1)


This will give us,


y + 2 = 2 {x}^{2}  - 4x + 2


y =  {x}^{2}  - 4x

This equation is now in the form,

y = a {x}^{2}  + bx + c
where

a=1,b=-4,c=0

This is the standard form
7 0
3 years ago
Let l be the length of a diagonal of a rectangle whose sides have lengths x and y, and assume that x and y vary with time. If x
meriva

The rate of change of the size of the diagonal is; 25.2 ft/s

By Pythagoras theorem;

The length, l of a diagonal of a rectangle whose sides have lengths x and y is;

  • l² = x² + y².

In essence; the length of the diagonal is dependent on the length, x and y of the sides.

Therefore;

(dl/dt)² = (dx/dt)² + (dy/dt)²

where;

  • (dx/dt) = 19 ft/s
  • (dy/dt) = -15 ft/s

Therefore,

(dl/dt)² = 19² + (-15)²

(dl/dt)² = 361 + 225

dl/dt = √586

dl/dt = 25.2

Therefore, the size of the diagonal is changing at a rate of; 25.2 ft/s.

Read more;

brainly.com/question/12559989

4 0
2 years ago
K anyone help please
tigry1 [53]

Answer:

Step-by-step explanation:

Given equation is,

a). y = \frac{6}{x}

x        0.5                1            2            3            4              5             6

y       \frac{6}{0.5}=12      \frac{6}{1}=6      \frac{6}{2}=3      \frac{6}{3}=2     \frac{6}{4}=1.5     \frac{6}{5}=1.2     \frac{6}{6}=1

b). By plotting the input-output values on the graph we get the curve as shown in option C.

Therefore, Option C will be the answer.

7 0
3 years ago
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