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3 years ago

Factories fully10ab - 5b²

Mathematics

2 answers:

cestrela7 [59]3 years ago

8 0

Answer:

10ab - 25b

Step-by-step explanation:

10ab - 5b²

10ab - 5b × 5b

10ab - 25b

kap26 [50]3 years ago

8 0

10ab-25b is the answer

hope this helps you

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Please help! Thank you so much.

inysia [295]

Answer:

4 over 5

Step-by-step explanation:

its 4 over 5 because your going to get a decimal and the other answers you will get a integer which the question isnt asking for so the answer is 4 over 5

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3 years ago

Alonso leans a 28-foot ladder against a wall so that it forms an angle of 65° with the

lorasvet [3.4K]

The horizontal distance between the base of the ladder and the wall is: 11.8 foot

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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

5 0

3 years ago

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slava [35]

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3 years ago

there are 2000 sheets of paper in 4 reams of paper.which of the following expresses the ratio of reams to paper?

antoniya [11.8K]

-4:2000

-2:1000

-1:500

Hope this helped☺☺

4 0

3 years ago

Factories fully10ab - 5b²​

Factories fully10ab - 5b²