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Stolb23 [73]
3 years ago
13

Can’t pls help me with this question

Mathematics
1 answer:
mixer [17]3 years ago
6 0

Answer:

Let

Total number of people (T)=1600

those satisfied with the car (t) =720

The percentage of the satisfied people(S)= number of satisfied people divided by the total number of people who took part in the survey, multiplied by 100

=> S=(T/t)*100

S=(720/1600)*100

S=45%

Step-by-step explanation:

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2+17+8 rewritten correctly using the commutative property and then simplified correctly
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Answer:

Step-by-step explanation:

I am sorry this is to confusing for me

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This is a simple question for you to answer to gain points. 2+2=
Zielflug [23.3K]

Answer:

4

Step-by-step explanation:

If you count by 2 two times you get 4.

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Solve the system of equations for (x, y) using inverse matrices.
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10. Determine the open interval(s) on which the function f(x) = 12x - x^3 is increasing.
Gre4nikov [31]

Answer:

\large\boxed{x\in(-2,\ 2)}

Step-by-step explanation:

f(x)=12x-x^3

Calculate the derivative of the function:

f'(x)=\left(12x-x^3\right)'=(12x)'-\left(x^3\right)'=12-3x^2

Calculate the zeros of the derivative:

f'(x)=0\Rightarrow12-3x^2=0\qquad\text{add}\ 3x^2\ \text{to both sides}\\\\3x^2=12\qquad\text{divide both sides by 3}\\\\x^2=4\to x=\pm\sqrt4\\\\x=\pm2

Let's check the derivative sign:

f'(x)>0\iff12-3x^2>0\qquad\text{use the distributive property}\\\\-3(x^2-4)>0\\\\-3(x^2-2^2)>0\qquad\text{use}\ a^2-b^2=(a-b)(a+b)\\\\-3(x-2)(x+2)>0\\^{\qquad x=2\qquad x=-2

Sketch a parabola open down

(before the brackets there is the number -3 < 0)

Look at the picture.

Where the derivative is negative, the function decreases.

Where the derivative is positive, the function increases.

Therefore your answer is:

x\in(-2,\ 2)

3 0
4 years ago
-2(x+8)=4x+10 what is the solution set of the equation
dmitriy555 [2]
Short answer : x = -13/3

But let's solve your equation step-by-step.

-2(x+8)=4x+10

Step 1: Simplify both sides of the equation.

(Distribute)

Step 2: Subtract 4x from both sides

Step 3: Add 16 to both sides.

Step 4: Divide both sides by -6.

Answer:

x = -13/3
4 0
4 years ago
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