3 years ago

What is 4x(5x-2)=20x-2

Mathematics

1 answer:

Zanzabum3 years ago

7 0

Answer: x = 1.32 and x= 0.076

Step-by-step explanation:

4x(5x-2) = 20x-2

20x^2-8x = 20x-2

20x^2-8x-20x+2=0

20x^2-28x+2=0

Using quadratic equation

x = (-b +or- √(b^2-4ac))/2a

a =20, b=28, c= 2

Substitute into the equation

x= (7+√39)/10. = 1.32

x = (7-√39)/10 = 0.076

You might be interested in

The vertices of a quadrilateral ABCD are A(4, 8), B(10, 10), C(10, 4), and D(4, 4). The vertices of another quadrilateral EFCD a

Korolek [52]

<span> The size of the quadrilaterals is different but shape is same. </span>

3 0

4 years ago

Read 2 more answers

PLEASE HELP 5 STAR + BRAINLY IF RIGHT!

Sever21 [200]

Right your ratio of $\frac{8}{12}$
Simplify fraction to 3/4
Now set it up with c/100 to find the percent (c equaling the percentage of caremel brownies)

Cross multiplty:
$\frac{2}{3} \frac{c}{100}$

Crossmultiply:
3c = 200
Divide (solve equation)

c = <span>66.6666666667</span>

7 0

3 years ago

Read 2 more answers

Vika made $35,500 last year. If her income is increased by 10.5%, what is her adjusted income,

stiks02 [169]

Answer:

$39,227.50

Step-by-step explanation:

Vika's income will be ...

$35,500 + 10.5%×35,500 = $35,500(1 +0.105) = $39,227.50

Vika's adjusted income is $39,227.50.

5 0

3 years ago

How many solutions will this system of equations have?(2 points)

Vaselesa [24]

It would have no solution because both lines have the same slope of -3.5 but different y-intercepts, which means that they are parallel and will never intersect.

4 0

3 years ago

Read 2 more answers

Please help with 7,8,9,10 and bonus

sergejj [24]

7 is 8.16

8 is 1516

9 is 19.625

10 is 18.84

and bonus is zero

3 0

3 years ago