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uranmaximum [27]
2 years ago
5

Find x. Round your answer to the nearest integer.

Mathematics
1 answer:
vivado [14]2 years ago
6 0

Answer:

B. 20

Step-by-step explanation:

Cos a = b/c

Cos 53° = b/25

b = 25 × 0,6 = 15

x = √(25² - 15²)

x = √(625 - 225)

x = √400

x = 20

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1. A sine function has the following key features
strojnjashka [21]

Answer:

1) y= 2sin(\frac{1}{2}x) + 2

2) y= 3sin(\frac{\pi}{2}x)-1

3) y= 2sin(2x) -2

Step-by-step explanation:

General form of sin function is

y= Asin(Bx) + C

Where A is Amplitude

B is \frac{2\pi}{\text{Period}}

C is Mid line

1) Given : A sine function has the following key features  

Frequency = \frac{1}{4\pi}

Period is P=\frac{1}{f}=\frac{1}{\frac{1}{4\pi}}=4\pi

Amplitude= 2

Mid line y= 2

Y intercept (0,2)  

This function is NOT a reflection of its parent function of the x-axis

Solution : We put the value in the general form of sin function

A= 2 ,  B=\frac{2\pi}{4\pi}=\frac{1}{2} , C=2

y= Asin(Bx) + C

y= 2sin(\frac{1}{2}x) + 2

2) Given : A sine function has the following key features  

Period = 4

Amplitude = 3

Mid line y = -1

Y intercept (0,-1)

Solution : We put the value in the general form of sin function

A= 3 ,  B=\frac{2\pi}{4}=\frac{\pi}{2} , C=-1

y= Asin(Bx) + C

y= 3sin(\frac{\pi}{2}x)-1

3) Given : A sine function has the following key features  

Period = \pi

Amplitude = 2

Mid line y = -12

Y intercept (0,-2)

Solution : We put the value in the general form of sin function

A= 2 ,  B=\frac{2\pi}{\pi}=2 , C=-2

y= Asin(Bx) + C

y= 2sin(2x) -2

5 0
3 years ago
If f(x)=-4x-5 and g(x)=3-x, what is f(5)?
lesantik [10]

Answer:

f(5)=

= 4x - 5 \\  = 4 \times 5 - 5 \\  = 20 - 5 \\  = 15

4 0
2 years ago
PLS IL GIVE U ALL MY POINTS IF ANSWERED
Advocard [28]

Answer:

The answer is D

7 0
1 year ago
HELP mejdjdjdbdbdhdhdhdhdhdgdhdhdhdhdhdhdhdhdhdhdhdhdh
Bess [88]

A. y=0.5x+2

Sorry if I didnt answer this soon enough!

hdhhejfkfjjskdjjfkdjnsnsnsma

7 0
3 years ago
6.Sarah is planning to fence in her backyard garden. One side of the garden is 34 feet long, another side is 30 feet long, and t
Sergeeva-Olga [200]

Answer:

D. $393.00

Step-by-step explanation:

We have to sum the three distances to get the perimeter.

P= 34 ft + 67 ft+ 30 ft

P = 131 ft

And each foot of material cost $3.00

we get the cost with the distance and de cost of the material:

Cost = 131 ft * 3.00 $ per ft = $393.00

Sarah needs $393.00 to fence her backyard garden

7 0
3 years ago
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