3 years ago

Which three expressions are equivalent to the expression 3x − 12 − 2(x + 12)?

Mathematics

2 answers:

Sergio039 [100]3 years ago

6 0

Answer:

The answer should be x - 36

Step-by-step explanation:

enot [183]3 years ago

4 0

Answer:

Step-by-step explanation:

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Ben earns an annual income of $12,800 a year. The income tax he has to pay is 15%. What is the amount of income tax in dollars a

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920

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3 years ago

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Use the quadratic formula to solve x2 + 9x + 10 = 0.<br> What are the solutions to the equation?

vampirchik [111]

Answer:

$\large\boxed{x=\dfrac{-9\pm\sqrt{41}}{2}}$

Step-by-step explanation:

$\text{The quadratic formula of}$

$ax^2+bx+c=0$

$\text{If}\ b^2-4a0,\ \text{then the equation has two solutions}\ x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\=========================================$

$\text{We have}\ x^2+9x+10=0\\\\a=1,\ b=9,\ c=10\\\\\text{substitute:}\\\\b^2-4ac=9^2-4(1)(10)=81-40=41>0\qquad _{\text{two solutions}}\\\\\sqrt{b^2-4ac}=\sqrt{41}\\\\x=\dfrac{-9\pm\sqrt{41}}{2(1)}=\dfrac{-9\pm\sqrt{41}}{2}$

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Please answer quickly and correctly please answer all question

Nata [24]

Answer:

1)d

6)b

7)d,c,b,a

8)a,b

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