3 years ago

Which contribution is a modification to Dalton's original atomic model?

Mathematics

2 answers:

VMariaS [17]3 years ago

7 0

The answer is B.

<em>At the time, Dalton didn't know anything about electrons. </em>

ahrayia [7]3 years ago

3 0

C
this is because i randomly guessed on ym test and got it right.

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Please help, I'm trying to finish these

umka2103 [35]

2 x length + 2 x width = perimeter.

2(2s-5) + 2(4s-13) = 108

Simplify:

4s-10 + 8s-26 = 108

Combine like terms:

12s - 36 = 108

Add 36 to both sides:

12s = 144

Divide both sides by 12:

s = 144/12

s = 12

Now replace s with 12 in each equation:

2(12) - 5 = 24-5 = 19

4(12) - 13 = 48-13 = 35

The answer is d. 35,35, 19,19

8 0

3 years ago

Read 2 more answers

The circle C has centre A(2,1) and passes through the point B(10,7). Find and equation for C

Semmy [17]

The equation of a circle:
$(x-h)^2+(y-k)^2=r^2$
(h,k) - the coordinates of the centre
r - the radius

$A(2,1) - \hbox{the centre} \\
h=2 \\ k=1 \\ \\
(x-2)^2+(y-1)^2=r^2 \\ \\
\hbox{passes through B(10,7)} \\
x=10 \\
y=7 \\ \\
(10-2)^2+(7-1)^2=r^2 \\
8^2+6^2=r^2 \\
64+36=r^2 \\
r^2=100 \\ \\
\hbox{the equation:} \\ \boxed{(x-2)^2+(y-1)^2=100}$

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3 years ago

The perimeter of a rectangular pentagon is 110 mm, find the length of one side

Mashutka [201]

Answer:

22mm

Step-by-step explanation:

4 0

3 years ago

What’s the answer ???????????????????

Alenkinab [10]

Answer:

f(9) = - 2/3

Step-by-step explanation:

I don't really know how to answer those but I think I am right

8 0

3 years ago

Help meh plsssss!!!!

Mashutka [201]

you were right because -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 so that's 19 numbers

8 0

2 years ago