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2 years ago

Help plssssssssssssssssss

Mathematics

1 answer:

bazaltina [42]2 years ago

7 0

The ANSWER is D. -(3/-2)

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E Find the mode of the data set: 25,29, 22,19,20,29, 23, 29, 19,31

Vesna [10]

Answer:

the mode is 29

Step-by-step explanation:

the mode is the number that appears most often in a set of data, thus making it 29

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2 years ago

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I'LL GIVE BRAINLIEST

Nutka1998 [239]

Answer:

Exact form: v=80/13

Nearest tenth: 6.2

Step-by-step explanation:

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2 years ago

What is the sum of 20x^2-10x-30

ivann1987 [24]

Answer:

The sum of the roots is 0.5

Step-by-step explanation:

The correct question is

What is the sum of the roots of 20x^2-10x-30

we know that

In a quadratic equation of the form

$ax^{2} +bx+c=0$

The sum of the roots is equal to

$-\frac{b} {a}$

in this problem we have

$20x^{2} -10x-30=0$

$a=20\\b=-10\\c=-30$

substitute

$-\frac{(-10)} {20}=0.5$

Verify

Find the roots of the quadratic equation

The formula to solve a quadratic equation is equal to

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

$a=20\\b=-10\\c=-30$

substitute

$x=\frac{-(-10)\pm\sqrt{-10^{2}-4(20)(-30)}} {2(20)}$

$x=\frac{10\pm\sqrt{2,500}} {40}$

$x=\frac{10\pm50} {40}$

$x=\frac{10+50} {40}=1.5$

$x=\frac{10-50} {40}=-1$

The roots are x=-1 and x=1.5

The sum of the roots are

$-1+1.5=0.5$ ----> is ok

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3 years ago

How far can light travel in 7 minutes?

Yanka [14]

Answer:

92 million miles

Step-by-step explanation:

hope this helps

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plz mark brainliest

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2 years ago

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Find area of the shape

pentagon [3]

The answer is a. You find the area of each shape and add them

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