2 years ago

Can someone please!!! Help me

Mathematics

1 answer:

timurjin [86]2 years ago

7 0

The answer to this question is true

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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:

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

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3 years ago

Does anyone know this answer

aniked [119]

Answer:

C = -30

Step-by-step explanation:

C = 5/9 (F - 32)

C = 5/9 ( - 22 - 32)

C = 5/9 ( -54)

C = -30

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3 years ago

A recipe needs 1/4 tablespoon salt.

-Dominant- [34]

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Step-by-step explanation:

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2 years ago

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A jar of peanut butter weighs 7 ounces, and a jar of jelly weighs 4 ounces. If Karen buys 8 jars of peanut butter, how many jars

ad-work [718]

Karen will have to buy 14 jars to have an equal weight of peanut butter

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3 years ago

To the nearest hundredth, what is the length of line segment AB ?

sladkih [1.3K]

The answer is 5.83
Use the Pythagorean Theorem to calculate the 3rd side length.
a^2+b^2=c^2
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3 years ago