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kvasek [131]
3 years ago
6

I really really need help with proving this using a two column proof:

Mathematics
1 answer:
Naddik [55]3 years ago
4 0
I'm sorry i'd like to help, but i'm rlly bad at it too. I just finished that module and i still don't get it....

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A jar contains 5 black and 9 white marbles priscilla draws a marble from the jar what is the probability that she drew a black m
Vanyuwa [196]
The probability of the black marble will be 35.7% because 100/(9+5) is 7.14 and you multiply  that by 5 to get 35.7%.
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3 years ago
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What is the slope of the long represented by the equation y=4/5x-3
Gnom [1K]

Answer:

The slope would be 4/5

Step-by-step explanation:

y=(m)x+b and b is the slope.

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3 years ago
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How many quarts of pure antifreeze must be added to 8 quarts of a 40% antifreeze solution to obtain a 60% antifreeze solution
anyanavicka [17]

Let <em>q</em> be the number of quarts of pure antifreeze that needs to be added to get the desired solution.

8 quarts of 40% solution contains 0.40 × 8 = 3.2 quarts of antifreeze.

The new solution would have a total volume of 8 + <em>q</em> quarts, and it would contain a total amount of 3.2 + <em>q</em> quarts of antifreeze. You want to end up with a concentration of 60% antifreeze, which means

(3.2 + <em>q</em>) / (8 + <em>q</em>) = 0.60

Solve for <em>q</em> :

3.2 + <em>q</em> = 0.60 (8 + <em>q</em>)

3.2 + <em>q</em> = 4.8 + 0.6<em>q</em>

0.4<em>q</em> = 1.6

<em>q</em> = 4

4 0
2 years ago
WORTH 50! WILL AWARD BRAINLIEST! PLEASE SHOW STEPS! THANK YOU!
yanalaym [24]

Answer:

x = 45

Step-by-step explanation:

Re-order terms so constants are on the left
15 * x/9 - 42 =28

Combine multiplied terms into a single fraction
15x/9 - 42 = 28

Cancel terms that are in both the numerator and denominator
5x/3 - 42 = 28


4 0
2 years ago
How to find the length of a cylinder when given the volume and radius?
andriy [413]
It’s the heigh. Times the radius and volume

h= V/r
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3 years ago
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