2 years ago

$299 tv with 15% discount

Mathematics

2 answers:

Nuetrik [128]2 years ago

5 0

The answer is 254. You want 299 with 15% off

Natalka [10]2 years ago

5 0

Answer:

254.15 dollars you would have to pay.

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3 years ago

In the third degree polynomial function f(x) =x^3 + 4x, why are 2i and -2i zeros?

IgorC [24]

Answer:

We just need to evaluate and get f(2i)=0, f(-2i)=0.

Step-by-step explanation:

Since $i^2=-1$ , then $i^3=i^2i=-i$ , and we can apply this when we evaluate $f(x) =x^3 + 4x$ for 2i and -2i.

First we have:

$f(2i) =(2i)^3 + 4(2i)=2^3i^3+8i=8(-i)+8i=0$

Which shows that 2i is a zero of f(x).

Then we have:

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Which shows that -2i is a zero of f(x).

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3 years ago

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I would do it this way

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3 years ago

A group of 5 friends spent a total of $18 on a bottle of juice and a package of dried fruit for each of them. Each juice cost $1

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