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2 years ago

Free poi.nts but if you can figure this out:

Mathematics

1 answer:

Digiron [165]2 years ago

4 0

Answer:

hiiii how r u

Step-by-step explanation:

brainiest pleasee

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Simplify the following expression:

nalin [4]

-2/2 I think probably

3 0

3 years ago

Evaluate 8-m/n +m when m=8 and n=2

RUDIKE [14]

Substitute the answer: therefore, 8-8/2+8= 0/10 in fraction form, but as you feather simplify 0 divide by 10 you'll get the answer as 0.

3 0

3 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

Calculate x in the following ratio: x:12 = 6:3

Murrr4er [49]

Answer:

Step-by-step explanation:

x:12

6:3

When 12 go to 3: multiple 4

So 6 multiple 4 = 24

4 0

2 years ago

Read 2 more answers

Which pairs of variables would most likely have a positive association? Choose all that apply.

alex41 [277]

Answer:

The age of a kitten and it’s weight

Temperature and sales of Ice Cream

The number of notebooks bought and the total cost

Step-by-step explanation:

8 0

3 years ago