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elena-s [515]
2 years ago
7

Question 7 of 25

Mathematics
1 answer:
sdas [7]2 years ago
6 0

Answer:

x2

Step-by-step explanation:

x2

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Answer:  1/6

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*<br> The value of x is:<br> a) 4.2<br> b) 14<br> c) 18<br> d) 313<br> 4<br> 12
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A person wishes to mix coffee worth nine dollars per pound with coffee worth three dollars per pound to get 240 pounds of a mixt
Anastasy [175]
\bf \begin{array}{lccclll}&#10;&amount&price&priced\ amount\\&#10;&-----&-----&--------\\&#10;\textit{9 bucks/lb}&x&9&9x\\&#10;\textit{3 bucks/lb}&y&3&3y\\&#10;-----&-----&-----&-------\\&#10;mixture&240&5&1200&#10;\end{array}&#10;\\\\\\&#10;\begin{cases}&#10;x+y=240\implies \boxed{y}=240-x\\&#10;9x+3y=1200\\&#10;----------\\&#10;9x+3\left( \boxed{240-x} \right)=1200&#10;\end{cases}

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4 0
3 years ago
Using the quadratic formula, what is the value of x for x^2-4+5=0​
PSYCHO15rus [73]

value of x is: x= i and x= -i

Step-by-step explanation:

We need to find the value of x from x^2-4+5=0​ using quadratic formula.

The term is: x^2+1=0​

The quadratic formula is:

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

Where a = 1, b=0,c=1

Putting values:

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\x=\frac{0\pm\sqrt{(0)^2-4(1)(1)}}{2(1)}\\x=\frac{\pm\sqrt{-4}}{2}\\x=\frac{\pm2i}{2}\\x=\pm i

So, value of x is: x= i and x= -i

Keywords: Quadratic formula

Learn more about quadratic formula at:

  • brainly.com/question/7361044
  • brainly.com/question/10666510
  • brainly.com/question/1332667

#learnwithBrainly

4 0
3 years ago
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