All categories

3 years ago

Help pls! this is due tonight. thanks!

Mathematics

2 answers:

erma4kov [3.2K]3 years ago

6 0

Answer:

Neon: 0

Oxide: -2

Copper: 2

Tin: 0

Step-by-step explanation: To solve you must add/subtract the numbers to get the charge, for example if its -30 charge from electrons and 10 charge from protons, -30 + 10 = -20 therefore the charge is -20

Eva8 [605]3 years ago

3 0

Answer: 0,-2,2,0

Step-by-step explanation:

Add the numbers together and you get the answers.

You might be interested in

If you solve the equation for ax+by/c=d for x, what would you get?

Xelga [282]

Answer:

x=d/a - by/ac

Steps:

ax+by/c=d

(cax+by)/c=d

cax+by=cd

cax=cd-by

x=(cd-by)/ca

x=cd/ca - by/ca

x=d/a - by/ac

5 0

3 years ago

If you know the answer to this let me know pls!

Bad White [126]

Answer:

I think it is C.

Step-by-step explanation:

Have a good day. :-)

5 0

3 years ago

The first AMC 8 was given in 1985 and it has been given annually since that time. Samantha turned 12 years old the year that she

Lorico [155]

I would start like this: which year was the seventh AMC 8??

the first was in 1985
The second: 1986
3: 1987
4: 1988
5: 1989
6: 1990
7: 1991

so seventh AMC 8 took place in 1991.
she was then 12, so we can subtract this age from 1991:

1991-12=1979

so she was born in 1979!

5 0

3 years ago

I need help answering the question in the picture provided

adoni [48]

answer:

(a).

Equation of circle is x² + y² - 25 = 0

(b).

(-5, 0) » yes

(√7, 1) » no

(-3, √21) » no

(0, 7) » no

Step-by-step explanation:

(a).

If centred at origin, centre is (0, 0)

General equation of circle:

${ \boxed{ \bf{ {x}^{2} + {y}^{2} + 2gx + 2fy + c = 0}}}$

but g and f are 0:

${x}^{2} + {y}^{2} + c = 0 \\ but : \\ c = {g}^{2} + {f}^{2} - {r}^{2} \\ c = { - 25}$

8 0

3 years ago

Solve the two-step equation. - 2/3 x - 21/4 = 27/4

Natasha_Volkova [10]

Answer:

x = -18

I hope this helps!

6 0

3 years ago

Read 2 more answers