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Feliz [49]
2 years ago
10

A cell phone plan costs $30 per month for unlimited calling plus $0.15 per text message.

Mathematics
2 answers:
Zolol [24]2 years ago
8 0
Complete the question so I can help you real quick
Sonja [21]2 years ago
8 0

We were not given a question so I know a question that is commonly asked with the info you gave us is, what equation could be made using the information. I decided to answer that so you can get your answer ASAP.

So the cell phone plan costs $30 am month plus $0.15 per a text message. The equation we could use to figure out how much the phone plan would cost total is $30+$0.15x. x represents how many text messages the person sends. I hope this helps and if you have any questions please let me know.

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DochEvi [55]

Answer:

Which formula can be used to find the surface area of the hemisphere? ... Recall that the formula for the volume for a sphere is v=4/3πr^3 and the ... Type A is a spherical ball with a radius of 12 inches. ... r=6cm. SA=1/2(4πr^2)+πr^2. SA=2π(6)^2+π(6)^2. SA=72(3.14)+36(3.14) ... The diameter of the hemisphere is 48 feet.

Step-by-step explanation:

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Solve the equation x-4/2=10
hodyreva [135]
X-4/2 = 10

x+-2=10

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2 years ago
Find all the zeros of the equation<br> -3x^4 + 27x^2 + 1200 = 0
guajiro [1.7K]

Answer:

\displaystyle x=-5,\ x=5,\ x=4i,\ x=-4i

Step-by-step explanation:

Biquadratic Equation

It's a fourth-degree equation where the terms of degree 1 and 3 are missing. It can be solved for the variable squared as if it was a second-degree equation, and then take the square root of the results

Our equation is

\displaystyle -3x^4+27x^2+1200=0

If we call y=x^2, our equation becomes a second-degree equation

\displaystyle -3y^2+27y+1200=0

Dividing by -3

\displaystyle y^2-9y-400=0

Factoring

\displaystyle (y-25)(y+16)=0

It leads to these solutions

\displaystyle y=25\ ,\ y=-16

Taking back the change of variable, we have for the first solution

\displaystyle x^2=25\Rightarrow x=-5,x=5

Now for the second solution, we get imaginary (complex) values

\displaystyle x^2=-16\Rightarrow x=4i,\ x=-4i

Summarizing, the four solutions for x are

\displaystyle x=-5,\ x=5,\ x=4i,\ x=-4i

5 0
3 years ago
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