3 years ago

Find the product -7(-a2)(-b3)

Mathematics

1 answer:

vlada-n [284]3 years ago

7 0

$-7(-a^2)(-b^3)=\boxed{-7a^2b^3}$

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Consider the polynomial operation 3x(x − 2)(5x + 2). Is the expression equivalent? Select Yes or No for A‐D.

Sav [38]

Answer:

see attached

Step-by-step explanation:

3x(x − 2)(5x + 2)

(x − 2)(5x + 2) expand
5x² - 8x - 4
3x ( 5x² - 8x - 4) expand
15x³ - 24x² - 12x

3 0

3 years ago

Use the figure. Help me with this please

defon

The answer is C: 4.4

It might be A at the same time tho LMOO

4 0

3 years ago

Which set of ordered pairs is a function?

Juliette [100K]

Answer:the answer is {( -5,1),(-3,2),(-1,3),(1,4),(3,5)}

Step-by-step explanation: The x should not repeat

6 0

3 years ago

Solve the following inequality: 10t + 7 , 200 > 21 , 000

Alla [95]

Answer:

t > 1380

Step-by-step explanation:

Subtract 7200 from both sides

10t + 7200 - 7200 > 21000 - 7200

Simplify

10t > 13800

Divide both sides by 10

10t/10 > 13800/10

Simplify

t > 1380

4 0

3 years ago

Explain whether the following given sets are closed under addition:

Ivan

Answer:

Step-by-step explanation:

a) Yes.

$\forall\ a,b\ \in\ B,\ a+b\in B\ (since\ 0+0=0)$

b) Yes

$W=\{0,1,2,3,..,\}\ (whole\ numbers)\\\forall\ a,b\ \in\ 3W,\ a+b\in 3W\\since:\\a\ \in\ 3W \Longrightarrow\ \exists\ k_1\in W | a=3*k_1\\\\b\ \in\ 3W \Longrightarrow\ \exists\ k_2\in W | b=3*k_2\\\\a+b=3*k_1+3*k_2=3*(k_1+k_2) \in 3W\\$

c) Yes

$\forall n\ \in\ \mathbb{N}: \Longrightarrow\ n+1 \in\ \mathbb{N}\\$

d) No

$3\in V , 3+3=6\notin V\\$

7 0

3 years ago