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bixtya [17]
3 years ago
14

Please help me with 4,11, and 12.

Mathematics
1 answer:
irina1246 [14]3 years ago
7 0

4. C and D both are correct

12. H

11. B

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How do I solve this equation?
Gnom [1K]

2x(4-x)^{-1/2}-3(4-x)^{1/2}=(4-x)^{-1/2}\bigg(2x-3(4-x)\bigg)

We effectively rewrite the equation as

\dfrac{5x-12}{(4-x)^{1/2}}=0

In order for the LHS to be defined, we need to restrict 4-x>0, or x. Now, the LHS will vanish when the numerator is 0, which happens for

5x-12=0\implies5x=12\implies x=\dfrac{12}5

This value is indeed smaller than 4, so the solution is x=\dfrac{12}5.

8 0
3 years ago
Elena ate 2/8 of a pizza and dylan ate 1/5. How much of the pizza elena and dylan ate in all?
bearhunter [10]
First make the 2 fractions to one common denominator,
10/40 and 8/40 and add them,
10/40 + 8/40 = 18/40
simplified, 9/20
answer- 9/20 of the pizza
3 0
3 years ago
Read 2 more answers
Imagine that James has been bowling for over 10 years and never gets any better or any worse. The probability that he will bowl
vichka [17]

Answer:

5.01%

Step-by-step explanation:

In order to calculate a sequence of events you need to multiply the probability of each event happening with one another in decimal form. In this scenario, the probability of James bowling a strike is 55% meaning that the probability of James NOT bowling a strike is 45%. We want to know the probability of James NOT bowling a strike for 3 attempts and then bowling a strike on his fourth attempt. We first turn these probabilities into decimal form by dividing them by 100. And then multiply...

55 / 100 = 0.55

45 / 100 = 0.45

0.45 * 0.45 * 0.45 * 0.55 = 0.05011875

Multiply by 100 to get percentage.

0.05011875 * 100 = 5.01%

7 0
3 years ago
Raphael cleaned 13 out of 25 rooms all by himself
yKpoI14uk [10]

okay but like do you even need any help??

6 0
3 years ago
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Will make brainliest if answer correctly
Irina18 [472]
The answer to this is c
6 0
4 years ago
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