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Andre45 [30]
4 years ago
11

Complete the steps used to slove a system of liner equations by substituting the value of y into one of the original equations t

o find the value of x. What is the solution?
Mathematics
1 answer:
Aneli [31]4 years ago
8 0

Answer:

Solve one of the equations for y, take that answer and plug into the second equation in place of y. Then solve for x.

Step-by-step explanation:

Need equations if you want actual answer

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A package of 30 scented pencils costs $24.90. At this rate, what is the
masya89 [10]

Answer:

.83 cents

Step-by-step explanation:

8 0
3 years ago
The blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 256.3 and a standard deviation of
AnnyKZ [126]

Answer:

a) In the interval  (  55,9  ;   456,7 ) we will find 99,7 % of all values

b) In the interval  (  122,7  ;  389,9 ) we find 95,4 % of all values

Step-by-step explanation:

For a Normal distribution N (μ ; σ ) the Empirical rule establishes that the intervals:

( μ  ±  σ  )          contains 68,3 % of all values

( μ  ±  2σ  )        contains 95,4 % of all values

( μ  ±  3σ  )        contains 99,7 % of all values

If   N ( 256,3 ; 66,8 )

σ  =  66,8        ⇒   3*σ  = 3 * 66,8  = 200,4

Then:     256,3 - 200,4  =  55,9

And        256,3 + 200,4 = 456,7

a) In the interval  (  55,9  ;   456,7 ) we will find 99,7 % of all values

b) 2*σ  = 2 * 66,8  = 133,6

Then  256,3 - 133,6  = 122,7

And    256,3 + 133,6 = 389,90

Then in the interval  (  122,7  ;  389,9 ) we find 95,4 % of all values

4 0
3 years ago
3. Jessica is playing a board game with her mother. The spinner used for
Natali [406]

Answer:

C. 1/25

Step-by-step explanation:

I assume this is a fair spinner and the probability of landing in all colors is equal.

First spin:

p(purple) = 1/5

Second spin:

p(purple) = 1/5

The two spins are independent events, so the probability of landing on purple twice is the product of the two individual probabilities.

p(purple and purple) = 1/5 * 1/5 = 1/25

4 0
3 years ago
Between 6am and 10am the temperature rose by 5 degrees F. Between 10am and 2pm the temperature rose by 6 degrees F. Between 2pm
Rus_ich [418]
No, a degree in C is much larger than a degree in F, so since the two are used in this question, it is imposable to know if the temperature raised at all between the time of 2 pm and 6pm
4 0
3 years ago
Read 2 more answers
Probability Please Help!!!
Alex777 [14]

Answer:

0.218

Step-by-step explanation:

If x represents student that study more than one day, then the probability of x will be 78.2%. In other words, out of 1000 student, 782 of them will study more than one day while 218 of them only study for one day or less

The question asking for the probability that a randomly selected student did not study more than one day, which negation of X statement. So the answer will be ~X= 100%- 78.2%= 21.8%= 0.218

7 0
3 years ago
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