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3 years ago

You are choosing between two different cell phone plans. The first plan charges a rate of 21 cents per

Mathematics

1 answer:

katovenus [111]3 years ago

5 0

Answer:

5 minutes

Step-by-step explanation:

21c=49.95+10c

subtract 10c from each side

11c=49.95

divide each side by 11

c=4.54

round to the nearest minute = 5 minutes

hope this helps

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Please help if you can. If possible please type how you got the answer so I can remember it next time I get a question like this

Gre4nikov [31]

Answer:

(2,3)

Step-by-step explanation:

I did this by using the equation that was given. y=x+1.

This mean that the starting point would be the coordinate (0,1) and the x is the slope, which means that from coordinate (0,1) I will go up one and one to the right until I intersected with coordinate (2,3).

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2 years ago

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Please help brain fam!!!

Alex787 [66]

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3 years ago

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An accident at an oil drilling platform is causing a circular-shaped oil slick to form. The volume of the oil slick is roughly g

Basile [38]

Answer:

$V(t)=0.0112\pi t^{2}$

Step-by-step explanation:

we have

$V(r)=0.07\pi r^{2}$ -----> equation A

$r(t)=0.4t$ -----> equation B

To find out (V of r)(t) substitute equation B in equation A

$V(r(t))=V(t)$

$V(t)=0.07\pi (0.4t)^{2}$

$V(t)=0.07\pi (0.16)t^{2}$

$V(t)=0.0112\pi t^{2}$

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3 years ago

How you do multiply complex numbers ? Example : (9 - 4i) (8 + 6i)

Andrew [12]

You multiply them just as you would multiply any normal polynomials, except there is a special rule. Since we know that i = √-1, the rule is that i² = -1. So, let's multiply:

$(9-4i)(8+6i) = 72+54i-32i-24i^2$