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
GrogVix [38]
3 years ago
12

What is the sum of (–2.1x + 3.7) and (5 + 4.9x)?

Mathematics
2 answers:
Dmitry [639]3 years ago
7 0

The answer is C.

2.8x + 8.7

adoni [48]3 years ago
3 0
Combine like-terms
-2.1x and 4.9x = 2.8x
3.7 and 5 = 8.7
2.8x + 8.7 is your final answer.
You might be interested in
Middle school math.​
Nonamiya [84]
The last one the reason is 2 is how much weeks so it’d be 2x - 126 cause that’s how much she wants to lose
7 0
3 years ago
Read 2 more answers
In triangle DEF measurement angle D = 45 degrees meausrement angle E = 63 degrees and EF = 24 inches. What is DE to the nearest
alexandr1967 [171]
Since the angles add to 180°, angle F is 72°.

Using the law of sines,

DF/sin72° = 24/sin45°
x = 32.28

So, did you just guess at A?

This is just an answer from another website, but it should still work.
7 0
3 years ago
Read 2 more answers
Please help asap :( This is my "Final grade" My Teacher wants a full explanation included ! on how i got the answer. )
Mrac [35]

If the whole diameter of sphere is 6 inch(means radius is 3 inch) & thickness of material is 1 inch, so the radius of the hollow part should be 2 inch (3-1=2)

The total volume of the ball will be;

= Total volume - Volume of hollow part

= 4/3πr³ - 4/3πr³

= 4/3 × 3.14 × (3)³ - 4/3×3.14×(2)³

= 4 × 3.14 × 9 - 4/3 × 3.14 × 8

= 113.04 - 33.52

= 79.52

If the density of the material is 3.25 g/in3, then the density of 79.52 inch³ should be;

= 79.52 × 3.25

= 258.44 g

Now, if there are 8 spheres in one box, the weight if box will be;

= 258.44 × 8

= 2,067.52 g

_____________________________

Ahh! Finally done with this, if you have any doubt just do ask me :)

3 0
3 years ago
A copy machine can print 480 copies every 4 minutes. A teacher printed 720 copies. How long did it take to print?
Dafna1 [17]

Answer:

6 minutes

Step-by-step explanation:

every minute is 120

720/120=6

3 0
2 years ago
Read 2 more answers
Factor: 100x^2- 81
Alex17521 [72]

Answer:

Choice 'D' (10x + 9) (10x-9) is the correct answer

Step-by-step explanation:

100x^2 - 81

This is a difference of squares...

therefore = (10x + 9) (10x - 9)

7 0
3 years ago
Other questions:
  • How do negative exponents become positive?
    10·1 answer
  • Model of how to find quotient 2.4 divided by 3
    15·1 answer
  • Write the conversion factor for converting meters to centimeters.
    11·2 answers
  • I don’t know # 6 and #8 plz help
    10·1 answer
  • Compare 9 X 10^4 to 3 X 10^2
    9·1 answer
  • (8.91 times 10 Superscript 2 Baseline) (3.3 times 10 Superscript 12 Baseline)
    12·1 answer
  • Please help:( I would really appreciate it
    6·1 answer
  • Evaluate the expression when b= 19 and c=5.
    6·1 answer
  • Match the reasons with the statements in the proof.
    13·2 answers
  • Find the slope and the equation for 12x+2y=-10 using points (-1,2)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!