3 years ago

HELP PLEASE 40 Points both questions please

Mathematics

1 answer:

Anit [1.1K]3 years ago

4 0

The answer for this is C.

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3) Solve each equation using the quadratic formula. Show<br> a. x2 – 3x – 10 = 0

Naya [18.7K]

Answer:

Step-by-step explanation:

The quadratic formula of a quadratic equation

$ax^2+bx+c=0\\\\\text{If}\ b^2-4ac>0\ \text{then the equation has two solutions}\ x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

$\text{If}\ b^2-4ac=0\ \text{then the equation has one solution}\ x=\dfrac{-b}{2a}$

$\text{If}\ b^2-4ac$

We have:

$x^2-3x-10=0\to a=1,\ b=-3,\ c=-10\\\\b^2-4ac=(-3)^2-4(1)(-10)=9+40=49>0\\\\x=\dfrac{-(-3)\pm\sqrt{49}}{2(1)}=\dfrac{3\pm7}{2}\\\\x=\dfrac{3-7}{2}=\dfrac{-4}{2}=-2\\or\\x=\dfrac{3+7}{2}=\dfrac{10}{2}=5$

5 0

3 years ago

Evaluate (-27)^-4/3 ((-27 to the power of -4/3))

masha68 [24]

Answer:

-1/81

Step-by-step explanation:

-27^-4/3

cbrt(-27^-4)

cbrt(-1/531441)

-1/81

5 0

3 years ago

Read 2 more answers

Help me with example 2 and 3

PolarNik [594]

Thanks! You got the concept, so use the formula from the top of the page to help you. Use the information provided in the examples and set up the formula with the correct numbers. Then, solve. Then you will find out how much you need to owe.

5 0

3 years ago

Simplify (x^-5) (x^2)*

Pani-rosa [81]

Answer:

1/x^3

Step-by-step explanation:

foil method

6 0

3 years ago

Use the figure to find the radius.

BlackZzzverrR [31]

The answer is 4 (four)

3 0

3 years ago