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jeka57 [31]
2 years ago
13

Given the two chemical equations, circle the one that is balanced.

Mathematics
1 answer:
max2010maxim [7]2 years ago
3 0
B is correct hope this helps
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The names of 9 boys and 2 girls are in a hat. What is the probability of first drawing a girl’s name and then a boy’s name from
alex41 [277]
B.) 9/55
this is because first you have a 2/11 chance of getting a girl's name then you have a 9/10 chance of getting a boys name.
\frac{9}{10}  \times  \frac{2}{11}  =  \frac{9}{55}
5 0
2 years ago
Help with this two column proof
ddd [48]
We're given LM = NO which will be used in substitution later.

By the segment addition postulate, we can write 
LN = LM+MN
which basically says "glue LM and MN together to get LN". All three segments fall on the same line.

Now substitute or replace LM with NO. This works because LM = NO is given

So we go from this
LN = LM+MN
to this
LN = NO+MN

Rearrange terms to go from 
LN = NO+MN
to 
LN = MN+NO
The formal property used is the "Commutative Property of Addition"

Now notice on the right hand side we can combine MN and NO to get MO. Again this is using the segment addition postulate. 

So the last step is going from 
LN = MN+NO
to 
LN = MO

Have a look at the attached image to see how to format this proof into a two-column proof. 

3 0
3 years ago
The sum of x,y and z is 952. if z is 40% less than the sum of x,y, then what is the value of z?
julsineya [31]
The answer is z is about equal to 380.4
Here is my math
952/3=317*2=643/100=6.43*40=253.6
643-253.6=380.4
5 0
3 years ago
Trigonometry
Sunny_sXe [5.5K]

Answer:

cosx = sqrt(15)/4, -sqrt(15)/4

Step-by-step explanation:

cos²x = 1 - sin²sin x

cos²x = 1 - (1/4)²

cos²x = 15/16

cosx = sqrt(15)/4, -sqrt(15)/4

5 0
3 years ago
Mauricio hits a baseball 4 times as often as Tony each game. He also hits 20 baseball's every Monday at practice. How many baseb
Alenkinab [10]

Answer:

36 hits

Step-by-step explanation:

Suppose Tony hits the ball x times and Mauricio hits a baseball 4 times as often as Tony each game.

So, Mauricio's hit = 4x

<em />

If Tony hits at the game, then Mauricio will hit 4 times as many times + the 20 at practice on mondays

<h2><em>Equation</em></h2><h3><em>4x + 20</em></h3>

<em />

<em>That means if Tony hit 4, Mauricio will hit </em>

<h2><em>4(4) + 20 = 36</em></h2>

Thus, Mauricio will hit 36 balls this week.

<em />

<em />

8 0
3 years ago
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