1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zlopas [31]
3 years ago
14

Find the sum of 7a^3 + 14a +12 and -6a^3 +12a^2 -7

Mathematics
2 answers:
SOVA2 [1]3 years ago
8 0
To find the sum:

{7a}^{3} + 14a + 12  + ( {- 6a }^{3} ) + {12a }^{2}   - 7 \\  = {7a }^{3}   -  {6a}^{3}  + {12a }^{2}  + 14a + 12 - 7 \\  =  {a}^{3}  + {12a }^{2}  + 14a + 5
Therefore the answer is a^3+12a^2+14a+5.
Hope it helps!
arsen [322]3 years ago
5 0

Answer:

a^3+12\cdot{a^2}+14\cdot{a}+5

Step-by-step explanation:

We can write the sum of the two expression as:

7\cdot{a^3}+14\cdot{a}+12+\cdot{(-6\cdot{a^3}+12\cdot{a^2}-7)}

We can multiply the plus sign in the second expression:

7\cdot{a^3}+14\cdot{a}+12-6\cdot{a^3}+12\cdot{a^2}-7

We must group the terms of a³, a², a terms and normal numbers:

(7-6)\cdot{a^3}+14\cdot{a}+12\cdot{a^2}-7+12

a^3+14\cdot{a}+12\cdot{a^2}+5

a^3+12\cdot{a^2}+14\cdot{a}+5

You might be interested in
Help with the step by step
Nataliya [291]

Step-by-step explanation:

First, distribute the -4 to the parenthesis:

24a-22=-4+24a

Add 22 to both sides:

24a-22+22=-4+22+24a

Simplify:

24a=18+24a

Subtract 24a from both sides:

24a-24a=18+24a-24a

Simplify:

0=18

hope this helps :)

4 0
3 years ago
Read 2 more answers
Which situation would require determining volume?
IrinaK [193]
A

Explanation: finding volume is a measure of how much space an object takes us.

Kiki wants to know how wide or how much space of her wall her window is taking up therefore the answer is A
8 0
3 years ago
Hannah has another candle that is 14 cm tall. How fast must it burn in order to also be 6 cm tall after 4 hours? Explain your th
RideAnS [48]

Answer:

The candle must burn at 2cm per hour in order to be 6cm tall after 4 hours. I know this because the candle has to burn 8cm in 4 hours and that amounts to 2cm per hour.

Step-by-step explanation:

Lets solve!

We have to find out how much of the candle needs to be burned!

14cm - 6cm = 8cm

The candle must burn 8cm in 4 hours!

Lets find out how much the candle burns in 1 hour.

\frac{8cm}{4hours}= 2cm per hour

The candle must burn at 2cm per hour in order to be 6cm tall after 4 hours. I know this because the candle has to burn 8cm in 4 hours and that amounts to 2cm per hour.

Woohoo, We did it! <u>Would you like to mark my answer as brainliest?</u> I would love that!

6 0
3 years ago
Mrs. Simmons gave a history test worth 92 points. There were only two types of questions on it: 2-point true/false questions and
SVETLANKA909090 [29]

Answer:

There are 8 true/false questions and 26  fill-in-the-blank questions.

Step-by-step explanation:

Let "t" be the number of 2-point true/false questions and "f" the number of 5-point fill-in-the-blank questions.

Mrs. Simmons gave a history test worth 92 points. Symbollically,

2 t + 5 f = 92   [1]

There were a total of 34 questions in the test. Symbollicaly,

t + f = 34

t = 34 - f   [2]

If we replace [2] in 1, we get

2 (34 - f) + 5 f = 92

68 - 2 f + 5 f = 92

3 f = 24

f = 8

We replace f = 8 in [2],

t = 34 - 8 = 26

There are 8 true/false questions and 26  fill-in-the-blank questions.

7 0
3 years ago
1025 divided by 5 long division
True [87]

Answer:

205

Step-by-step explanation:

6 0
4 years ago
Read 2 more answers
Other questions:
  • Me.Durham is contemplating which chauffeured car service to the airport. The first costs $30 up front and $3 per kilometer. The
    14·1 answer
  • Sandra is showing her work in simplifying (3.3 − 4.2) − 2.8 + 5.7. Identify any error in her work or reasoning. Step 1: (3.3 − 4
    6·2 answers
  • WILL MARK BRAINLYEST PLEASE HELP!!!
    5·1 answer
  • This year, Benny is 12 years old, and his mom is 48 years old.
    6·1 answer
  • Find the area in square inches of a parallelogram with a base of 12.54 inches and a height 17 inches. Round to the nearest hundr
    12·1 answer
  • The lowest elevation in Vermont is 95 feet above sea level. The lowest elevation in Louisiana is 8 feet below sea level. What in
    15·1 answer
  • 2x(x-2)+3x=2(x+1)+1<br> Please help ASAP and right it step by step and what kind of answer it is
    9·1 answer
  • . In the adjoining fig-6 , name a) any 4 pairs of intersecting lines. b) 3 non – collinear points c) 4 collinear points
    12·1 answer
  • The equation below can be used to find the length of a foot or forearm when you know one or the other.
    6·2 answers
  • State the property.<br> power property of exponents.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!