4 years ago

How many solutions will the following equation have? 25=20x-4x^2

1 answer:

lisabon 2012 [21]4 years ago

3 0

Hello,

$4x^2-20x+25=0\\

\Delta=20^2-4*4*25=0\\

x= \dfrac{20}{8} = \dfrac{5}{2} \\

4x^2-20x+25=0\\

(2x-5)^2=0\\

\mbox{One solution (double) Sol=\{ \dfrac{5}{2} \}}


$

You might be interested in

What is the value of x in the equation 3(4x-1)-3x=5-(x-8)?

Setler [38]

12x-3-3x=5-(x-8)
9x-3=5-(x-8)
9x-3=5-x+ 8
9x-3=13-x
9x=16- x
10x=16
X= 8/5

4 0

3 years ago

(01.01 MC)Why is 3 + (−5) equal to −2?

maxonik [38]

Because three minus five is -2 ..

3 0

3 years ago

Help me please i don’t understand

LenaWriter [7]

Answer:

Step-by-step explanation:

There are 10 red candies, 18 green candies, 9 yellow candies, and 13 brown candies.

10 + 18 + 9 + 13 = 50.

There is a total of 50 candies. Out of the 50 candies, 18 are green.

$\frac{18}{50} \\$

You have to get to 250 .That means you do $\frac{18}{50} = \frac{x}{250}$

250 divided by 50 = 5.

18 x 5 = 90.

Therefore, she can expect 90 green candies

4 0

3 years ago

Which of the following points are solutions to the inequality below?

Helga [31]

The inequality :y ≥ 2 x - 1We shall plug-in all the values:A ) - 3 ≥ 6 - 1- 3 ≥ 5 ⊥ ( not correct )
B ) - 5 ≥ 4 - 1- 5 ≥ 3 ⊥C ) - 5 ≥ 6 - 1- 5 ≥ 5 ⊥D ) 0 ≥ 0 - 10 ≥ - 1 T ( correct )E ) - 8 ≥ 10 - 1- 8 ≥ 9 ⊥F ) - 9 ≥ 10 - 1- 9 ≥ 9 ⊥Answer: D ) ( 0, 0 ).

5 0

3 years ago

Read 2 more answers

The scale on a map is 1: 500000 Two towns are 7cm apart on the map Work out the actual distance between the towns. Give your ans

lions [1.4K]

Answer:

3,500,000

Step-by-step explanation:

(1×7)×500000 or 7×500000

5 0

3 years ago