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Firlakuza [10]
3 years ago
13

What is the amplitude of y = 4 cos 3x? oc o timmt

Mathematics
1 answer:
JulijaS [17]3 years ago
4 0

Answer:

The amplitude is 4

Step-by-step explanation:

Recall that the amplitude of a harmonic form like this one based on the cosine function is the absolute value of the coefficient that multiplies the function. In our case that coefficient is 4.

So the amplitude of this function is "4".

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Eight friends went to a hockey game. The
ASHA 777 [7]

Step-by-step explanation:

Four bought a book at $6

4 x $6 = $24

8 x $x = $8x

Expression

$24 + $8x

3 0
3 years ago
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Find the vertex and length of the latus rectum for the parabola. y=-1/2(x-2)^2+8
victus00 [196]
Y = -(1/2)(x-2)² +8
Re write it in standard form:
(y-8) = -1/2(x-2)²  ↔ (y-k) = a(x-h)²

This parabola open downward (a = -1/2 <0), with a maximum shown in vertex
The vertex is (h , k) → Vertex(2 , 8)
focus(h, k +c )
 a = 1/4c → -1/2 = 1/4c → c = -1/2, hence focus(2, 8-1/2) →focus(2,15/2)

Latus rectum: y-value = 15/2

Replace in the equation y with 15/2→→15/2 = -1/2(x-2)² + 8
Or -1/2(x-2)² +8 -15/2 = 0
Solving this quadratic equation gives x' = 3 and x" = 2, then 
Latus rectum = 5

4 0
3 years ago
Michel is headed to his aunt's house. For the first 2 hours he drives at 55 mph. For the next hour, he drives 70 mph. For the fi
polet [3.4K]

Answer:

the answer is 280

Step-by-step explanation:


5 0
3 years ago
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5. Sean has 56 bills in his pockets. The bills are only fives and tens.
noname [10]

Answer:

He have 43 bills of 10 and 13 bills of 5

Step-by-step explanation:

5x + 10y = 495

x + y = 56

Isolate x:

x = 56 - y

Substitute in the first equation:

5(56 - y) +10y = 495

280 -5y +10 y = 495

5y = 495 -280

5y = 215

y = 215/5

y= 43

Now substitute the value of y to find x:

x = 56 - y

x = 56 - 43

x = 13

3 0
2 years ago
Write an equation of lines whose graph is parallel to the graph of y=3x-10
katrin [286]
Parallel lines have the same slope.

So the graph of  [ y = 3x + any number ] is parallel
to the graph of  [ y = 3x - 10 ] .
7 0
3 years ago
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