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4 years ago

Which equation represents a function?

Mathematics

1 answer:

Len [333]4 years ago

3 0

Answer:

D) y= 3x^2 + 2 represents a function.

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A museum open at 8 a.m. in the first hour 350 people purchase admission tickets in the second hour 20% more people purchase admi

CaHeK987 [17]

350*17.50 + 350(1.2)*17.50 = 13475

4 0

3 years ago

Use a graphing calculator to solve the equation -2sin(theta)= 1.2 in the interval from 0 to 2pi.

elena-s [515]

Answer:

$\theta=\pi +arcsin(\frac{3}{5})\approx 3.785\\\\\theta=2\pi -arcsin(\frac{3}{5} ) \approx 5.64$

Step-by-step explanation:

As you can see from the graph I attached you, the possible solutions in the interval from 0 to 2π are approximately:

$\theta=3.7\\\\and\\\\\theta=5.7$

So, it's useful to solve the equation too, in order to verify the result:

$-2sin(\theta)=1.2\\\\sin(\theta)=-\frac{3}{5}$

Taking the inverse sine of both sides:

$\theta=\pi +arcsin(\frac{3}{5})\approx 3.785\\\\\theta=2\pi -arcsin(\frac{3}{5} ) \approx 5.64$

Using this result we can conclude the solutions in the interval from 0 to 2π are approximately:

$\theta\approx 3.785\\\\\theta \approx 5.64$

8 0

3 years ago

Use the Distributive Property to simplify -4(-a + 2)

marysya [2.9K]

Answer:

4a-8

Step-by-step explanation:

(-4×a)+(-4×2)

Distributive property

4 0

3 years ago

Read 2 more answers

How many solutions does the quadratic system shown below have ?

Anna11 [10]

It is 4! hope this helps>3

4 0

3 years ago

Suppose an advertising company wants to determine the current percentage of customers who read print magazines. How many custome

user100 [1]

Answer: 543

Step-by-step explanation:

Given : Level of confidence = 0.98

Significance level : $\alpha=1-0.98=0.02$

By using the normal distribution table,

Critical value : $z_{\alpha/2}=2.33$

Margin of error : $E=5\%=0.05$

The formula to find the population proportion if prior proportion of population is unknown :-

$n=0.25(\dfrac{z_{\alpha/2}}{E})^2$

$\Rightarrow n=0.25(\dfrac{2.33}{0.05})^2=542.89\approx543$

Hence, the company survey minimum sample having size =543

8 0

4 years ago

Read 2 more answers