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Sergio039 [100]
2 years ago
14

What is the solution to the system of equations? {5x−2y=−164x−5y=−23

Mathematics
1 answer:
lukranit [14]2 years ago
3 0

5x − 2y = − 16 | x 4

4x − 5y = − 23 | x 5

20x - 8y - 20x + 25 y = - 64 - (- 115)

25y - 8y = 115 - 64

17y = 51

y = 51 : 17

y = 3

5x - 2×3 = - 16

5x - 6 = - 16

5x = - 16 + 6

5x = - 10

x = - 10 : 5

x = - 2

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All of the following are ways to write 25 percent of N Except. A. (0.25)N B. 25/100N C. 1/4 N D. 25N
anygoal [31]
Except (D) 
because it's 25N not 0.25N
6 0
2 years ago
Three students, Linda, Tuan, and Javier, are given five laboratory rats each for a nutritional experiment. Each rat's weight is
Liula [17]

Answer:

The variance in weight is statistically the same among Javier's and Linda's rats

The null hypothesis will be accepted because the P-value (0.53 ) > ∝ ( level of significance )

Step-by-step explanation:

considering the null hypothesis that there is no difference between the weights of the rats, we will test the weight gain of the rats at 10% significance level with the use of Ti-83 calculator

The results from the One- way ANOVA  ( Numerator )

with the use of Ti-83 calculator

F = .66853

p = .53054

Factor

df = 2  ( degree of freedom )

SS = 23.212

MS = 11.606

Results from  One-way Anova ( denominator )

Ms = 11.606

Error

df = 12 ( degree of freedom )

SS = 208.324

MS = 17.3603

Sxp = 4.16657

where : test statistic = 0.6685

             p-value = 0.53

             level of significance ( ∝ ) = 0.10

The null hypothesis will be accepted because the P-value (0.53 ) > ∝

where Null hypothesis H0 = ∪1 = ∪2 = ∪3

hence The variance in weight is statistically the same among Javier's and Linda's rats

7 0
1 year ago
Think about the commutative property of real number operations as it applies to addition and subtraction of functions how do you
kati45 [8]
The question does not make sense.
The commutative property applies to addition and multiplication, not addition and subtraction.
The commutative property does not apply to subtraction or division because in those operations, the order of the numbers makes a difference, whereas in addition and subtraction the order does not make a difference.

For example:

Addition
5 + 4 = 9
4 + 5 = 9
5 + 4 = 4 + 5
Changing the order of the 4 and the 5 gives the same answer.
The commutative property does apply to addition.

Multiplication 
5 * 4 = 20
4 * 5 = 20
5 * 4 = 4 * 5
Changing the order of the 4 and the 5 gives the same answer.
The commutative property does apply to multiplication.

Subtraction
5 - 4 = 1
4 - 5 = -1
5 - 4 is not equal to 4 - 5
Changing the order of the 4 and the 5 gives a different answer.
The commutative property does not apply to subtraction.

Division
5/4 = 1.25
4/5 = 0.8
1.25 is not equal to 0.8.
Changing the order of the 4 and the 5 gives a different answer.
The commutative property does not apply to division.
8 0
2 years ago
Read 2 more answers
P(n,6)=3p(n,5) what is the value of n.​
Leokris [45]

Answer:

n = 10

Step-by-step explanation:

3n1!/(n-4)! = (n-1)!/( n-1-5)

3n(n-1)(n-2)(n-3)(n-4) / N-4 -------- case1 ( cancel ( n-4) from top and bottom)

= (n-1)(n-2)(n-3)(n-4)(n-5)(n-6) / n-6 --------- case 2 ( Cancel n-6 from top and

                                                                                 bottom and also cancel n-1,

                                                                                  n-2, n-3 with case 1)

3n = ( n-4)(n-5)

3n = n² - 5n - 4n + 20

3n =  n² - 9n + 20

0 = n² - 9n - 3n + 20

0 = n² - 12n + 20

0 = (n-2)(n-10)

n = 2  ( not valid)       n = 10

Therefore n = 10

6 0
2 years ago
A bicycle factory installs about 400 tires per day. Tires are installed Monday through Friday for 8 hours per day. The manager o
lions [1.4K]

Answer:

The results are likely invalid because it is unlikely that the tires installed in one hour on Monday will represent the entire population of tires.

Step-by-step explanation:

Out of 8 hours, do you really think one hour will represent it all?

This is why the resutls are likely invalid ( also I took the quiz )

Answer: The results are likely invalid because it is unlikely that the tires installed in one hour on Monday will represent the entire population of tires.

8 0
2 years ago
Read 2 more answers
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