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1 year ago

20 POINTS!

Mathematics

1 answer:

Norma-Jean [14]1 year ago

5 0

Answer:

C. $x^{3}$ - 4 $x^{3}$ - 24x + 21

Step-by-step explanation:

(x - 7)( $x^{2}$ + 3x - 3)

x( $x^{2}$ + 3x - 3) + -7( $x^{2}$ + 3x - 3)

( $x^{3}$ + 3 $x^{2}$ - 3x) + (-7 $x^{2}$ + -21x + 21)

$x^{3}$ - 4 $x^{3}$ - 24x + 21

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Dima020 [189]

Answer:

Step-by-step explanation:

y=3x+3, y=6x-6

6x-6=3x+3

3x=9

x=3

3 0

3 years ago

Read 2 more answers

If the angles of a triangle are (2y - 5)degrees, (y + 20)degrees, and (3y-5) degrees what are the values of the angles

NNADVOKAT [17]

Answer:

<h3> $\boxed{ \boxed{ \bold{ \sf{51.68 \: , \: 48.34 \:, \: 80.02}}}}$ </h3>

Step-by-step explanation:

Let's solve:

As we know that the sum of angles of traingle adds to 180°

$\sf{2y - 5 + y + 20 + 3y - 5 = 180}$

Collect like terms

⇒ $\sf{6y - 5 + 20 - 5 = 180}$

⇒ $\sf{6y + 15 - 5 = 180}$

⇒ $\sf{6y + 10 = 180}$

Move constant to right hand side and change it's sign

⇒ $\sf{6y = 180 - 10}$

Calculate the difference

⇒ $\sf{6y = 170}$

Divide both sides of the equation by 6

⇒ $\sf{ \frac{6y}{6} = \frac{170}{6} }$

Calculate

⇒ $\sf{y = 28.34}$

Now, let's replace the value:

⇒ $\sf{2y - 5 = 2 \times 28.34 - 5 = 51.68}$

⇒ $\sf{y + 20 = 28.34 + 20 = 48.34}$

⇒ $\sf{3y - 5 = 3 \times 28.34 - 5 = 80.02}$

Hope I helped!

Best regards!!

8 0

3 years ago

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Plzzz help me<br><br><br>In direct variation, as y increases, x decreases.<br><br><br>True or false?

Karolina [17]

I feel like that’s false

3 0

2 years ago

Tara has $2,000 in her savings account. David has one-tenths as much as Tara in his savings account. How much does David have in

Maru [420]

Answer:

$200

Step-by-step explanation:

You can take .1 times $2000 since 1-tenth is equal to .1

or you can 1 over ten times 2000 over 1 which makes 2000 over 10 and you divide 2000 by 10 to get $200

4 0

2 years ago

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1/2 (b - 10) + 2b = 25

Serggg [28]

Answer:

the answer is 12

Step-by-step explanation:

Simplify both sides of the equation.

12(b−10)+2b=25

(12)(b)+(12)(−10)+2b=25(Distribute)

12b+−5+2b=25

(12b+2b)+(−5)=25 (Combine Like Terms)

52b+−5=25

52b−5=25

add 5 to both sides.

52b−5+5=25+5

52b=30

multiply both sides by 2/5.

(25)*(52b)=(25)*(30)

b=12

4 0

3 years ago

Read 2 more answers