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muminat
3 years ago
9

Find the sum and choose the correct answer.

Mathematics
2 answers:
Alborosie3 years ago
5 0
B, n to the 3rd power + 4n to the 2nd power +8n -16
Alborosie3 years ago
5 0

Answer:

Option B (n³ + 4n² + 8n - 16)

Step-by-step explanation:

In this question we have to add two expressions given

( 2n³ + 4n² - 7 ) and ( -n³ + 8n - 9 )

( 2n³ + 4n² - 7 ) + ( -n³ + 8n - 9 )

Now we group the similar terms

( 2n³ - n³ ) + 4n² - ( 7 + 9 ) 8n

= n³ + 4n² - 16 + 8n

= n³ + 4n² + 8n - 16

Option B (n³ + 4n² + 8n - 16) is the correct answer.

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Factorise the following : ​
Free_Kalibri [48]

Answer:

(3x+4b)(a-2y)

Step-by-step explanation:

(3ax-6xy)+(8by-4ab)

3x(a-2y) -4b(-2y+a)

(3x+4b) (a-2y)

4 0
3 years ago
Read 2 more answers
Consider the rates 4/5 miles in 8 minutes and 4 minutes to travel 2/5 mile
Anna007 [38]

Answer:

960

Step-by-step explanation:

I'm not sure exactly what's the question, but here's what I found. Lets first put it in our own words.

Consider the speed 4/5 miles in 12 minutes to travel 2/8.

8 + 4 = 12, so you can replace that with 12 minutes.

Now, you can absolutely guess your question.

Time = 12 minutes.

Distance = x (Let x be distance)

Speed = 4/5.

Now, you find distance.

Distance Formula: You can use the equivalent formula d = st which means distance equals rate times time.

So 4/5 × 12, is 9.6.

In fraction, if you have 1 numbers after the decimal point, multiply both numerator and denominator by 10. So 9.6 = (9.6 × 10) × 10 = 960.

Here is a pattern I found

2/5 divided by 4 is 1/10

4/5 divided by 8 is 1/10

8 0
3 years ago
What ordered pair represents the number of jump ropes made per hour
V125BC [204]

where is the rest of the question?

is that it?

7 0
3 years ago
Read 2 more answers
What the answer is and what it is as a mixed number
qaws [65]
-17/6 is the unequal fraction answer. To put it as a mixed number, you simply divide it like it's set up and put the remaining 'leftovers' as the fraction. 12 divided by six equals two, leaving us with five left over, so the answer is 12 5/6
8 0
3 years ago
State whether the angles are complementary, supplementary, or neither.∠ACF and ∠FCB A. neither B.  complementary C. supplementar
maxonik [38]
Angle ACF complementary, because it's angle equals up to 90.and FCB is complementary also, because the angle equals 90. hope i helped.
3 0
3 years ago
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