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
Lelechka [254]
3 years ago
8

Please Help.....................................................

Mathematics
1 answer:
Anna71 [15]3 years ago
8 0
There are 13 protons because the atomic number (the number in the top left corner) represents the number of protons. Then, to find the number of neutrons, you take the number of protons and subtract it from the atomic mass (the number on the bottom) when it is rounded. The number of electrons is the same as the protons when the atom is neutral
You might be interested in
What is the value of the function when x = 6?
vladimir1956 [14]
The value would be 4
6 0
2 years ago
12. The width of a rectangle is 16.55 inches. The length of the rectangle is half its width.
zepelin [54]
The answer is D

16.55 divide by 2= 8.275
8.275+8.275+16.55+16.55=49.65
4 0
3 years ago
A town map has a scale of 2cm:0.5km what is the actual distance for a walk measured at 9cm on the map?
Nastasia [14]

Answer: 2.25 km

Step-by-step explanation:

2 cm = 0.5 km

9 cm = (9 x 0.5)/2

= 2.25 km

4 0
3 years ago
Read 2 more answers
-3x(x+8)+x+2(9-x-x^2) please show solving steps
Flauer [41]

Answer:

-5x^2 - 25x + 18

Step-by-step explanation:

-3x ( x + 8 ) + x + 2 ( 9 - x - x^2 )  ( original equation )

-3x^2 - 24x + x + 18 - 2x - 2x^2   ( distribute )

-3x^2 - 2x^2 - 24x + x - 2x + 18   ( order them based on the variables . )

( -3x^2 - 2x^2 ) (- 24x + x - 2x ) ( + 18 )    ( just separated them not a part of solving !! )

-5x^2 - 25x + 18    ( solved , and the answer :) )

Hope its helps !!!

4 0
2 years ago
Craig likes to collect records last year he had Tim records and his collection now he has 15 records what is the percent increas
Softa [21]

Answer:

50% I believe?

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • B(t)=50(1.4)^t
    8·1 answer
  • Marie mixes 20 liters of 12% acid solution with a 36% acid solution to make a 20% acid solution. How many liters of 36% solution
    7·1 answer
  • Divide. Express your answer in simplest form.
    7·1 answer
  • 2512=3.14(r2)(8)<br> What is the diameter???<br> Help please!!!!!!
    9·1 answer
  • Need help kinda stuck on this one!
    10·1 answer
  • Choose the answer that BEST supports this claim:
    5·2 answers
  • 2a2 + cb; a = 5, b = 11, and c = 3
    15·1 answer
  • What is the slope of this line?
    11·1 answer
  • 2x - x + 7 = x + 3 + 4
    10·1 answer
  • Sue spent 1 hour 19 minutes less than Jared reading last week. Jared spent 45 minutes less than Pete. Pete spent 3 hours reading
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!