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kolbaska11 [484]
3 years ago
5

I need help with number 21 please help!!!

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
4 0

Answer:

<h2>This is not a direct variation.</h2>

Step-by-step explanation:

Direct variation:

<em>mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other.</em>

<em>(y varies directly with x with a constant variation of k)</em>

y=kx;\ k\neq0

y=kx\qquad|\text{divide both sides by}\ x\\\\\dfrac{y}{x}=k\Rightarrow \dfrac{y}{x}=constant

21.\\\\x=y+2\qquad|\text{subtract 2 from both sides}\\\\x-2=y\qquad|\text{divide both sides by}\ x\\\\1-\dfrac{2}{x}=\dfrac{y}{x}\ro\dfrac{y}{x}=1-\dfrac{2}{x}\neq constant

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icang [17]

Answer:

Amplitude increases and the period decreases

Step-by-step explanation:

Here, we are to compare amplitude change and period change

The first equation is;

y = sin x

The second is

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Generally, the equation of a sine graph can be written as;

y = a sin (bx + c)

where a represents the amplitude and b refers to the period

In the first equation , a = 1 while in the second , a = 3 ; This shows an amplitude increase

In the first equation, b = 1 while in the second equation b = 2/3; this shows a period decrease

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3 years ago
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Nadusha1986 [10]
First, we know the formula for area is:
Area = Length* Width

Therefore, 128 = (3x+7)(x+5)

We can use the F.O.I.L method to multiply
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Now we add the sum → 3x² + 15x + 7x + 35 →  3x² + 22x + 35

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3x²+ 22x -93 = 0

Now you have to factor to solve for the x value.
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</span></span>x = 3 & x = -31/3 

The negative value is eliminated because u can't have a negative length.

The length is 3x+7

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3 0
3 years ago
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Answer:

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3 years ago
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Answer:

[24, 375]

Step-by-step explanation:

f(2) = 24

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4 years ago
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The area will be 700 ft.
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