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3 years ago

14

Selena orders CDs for a music shop. She just ordered 8 CDs from each of 11 pop artists and 5 CDs from each of 8 jazz artists. Ho

w many CDs did she order altogether

2 answers:

konstantin123 [22]3 years ago

6 0

Answer:

AWNSER:

(8x11)+(5x8)=128

Step-by-step explanation:

Ipatiy [6.2K]3 years ago

5 0

(8x11)+(5x8)=128
Selena order 128 CD'S all together.

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Answer:

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Step-by-step explanation:

We need to solve the equation $x^2-8x+41=0$ using quadratic formula.

The quadratic formula is:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

where a=1, b=-8 and c=41

Putting values in formula and finding x

$$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$\\$x=\frac{-(-8)\pm\sqrt{(-8)^2-4(1)(41)}}{2(1)}$\\$x=\frac{8\pm\sqrt{64-164}}{2}$\\$x=\frac{8\pm\sqrt{-100}}{2}$\\We \ know \ \sqrt{-1}=i\\x=\frac{8\pm10i}{2}\\x=\frac{8+10i}{2} \ or \ x=\frac{8-10i}{2}\\x=4+5i \ or \ x=4-5i$

So, Solving the equation $x^2-8x+41=0$ using quadratic formula we get $x=4+5i \ or \ x=4-5i$

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