Ask question

Ask question

All categories

3 years ago

9

10x3 + 3x2 – 20x – 6

1 answer:

Helga [31]3 years ago

4 0

-2
Because -2(10x+3) is (-20x-6) when you distribute

You might be interested in

64 POINT QUESTION<br><br> √(5-2x) - √(2-x) = 1

Ivanshal [37]

Answer:

x = 2 and x = -2

Step-by-step explanation:

The easiest way is to guess. We know that you can't have a square root of a negative number. This constrains x between negative infinity to 2. Testing 2 and -2, we see that it satisfy the equation.

The more systematic approach is shown below

$\sqrt{5-2x}-\sqrt{2-x}=1 \\\sqrt{5-2x}-\sqrt{2-x}+\sqrt{2-x}=1+\sqrt{2-x} \\\sqrt{5-2x} = 1+\sqrt{2-x}$

$5-2x=(1+\sqrt{2-x})^2\\5-2x=1+2\sqrt{2-x}+2-x\\2-x=2\sqrt{2-x}\\1-0.5x=\sqrt{2-x}\\(1-0.5x)^2=2-x\\1-x+0.25x^2=2-x\\0.25x^2-1=0\\0.25x^2 = 1\\x^2 = 4\\x = +/-2$

x= -2, 2

7 0

3 years ago

2x + 3y = 12 solve for y

Zielflug [23.3K]

2x+ 3y=12
-2x -2x
3y=12-2x
Divide both sides by 3
Y=4-2/3 x

4 0

3 years ago

Ava's birthday cake is about 11 7/10 cm long. her candles stick up from the cake an additional 5 4/10 cm. what was the total hig

Virty [35]

Total height of the cake and the candles is 17.1 cm

Step-by-step explanation:

Step 1: Convert the mixed fractions into decimal expressions.

11 7/10 cm = 117/10 = 11.7 cm

5 4/10 cm = 54/10 = 5.4 cm

Step 2: Find total height of the cake and the candles

Total height = 11.7 + 5.4 = 17.1 cm

3 0

4 years ago

Read 2 more answers

Carmen purchased a prepaid phone card for $30. Long distance calls cost 19 cents a minute using this card. Carmen used her card

gladu [14]

Have 3896minutes in creadit on her card

5 0

3 years ago

Read 2 more answers

which equation can be used to represent 'three minus the difference of a number and one equals one-half of the difference of thr

meriva

Answer:

3 - (x - 1) = 1/2(3x - 4)

Step-by-step explanation:

7 0

3 years ago