Which algebraic expression is a polynomial with a degree of 5?

Mathematics

2 answers:

timama [110]3 years ago

8 0

Answer:

2xy4 + 4x2y3 – 6x3y2 – 7x4

Step-by-step explanation:

The degree of a polynomial is the highest exponent of the expression. If there is more than one variable, the degree is calculated by adding the the exponents of the variables in the term.

3x5 + 8x4y2 – 9x3y3 – 6y5 has the term x3y3 and x4y2 which is degree 6

2xy4 + 4x2y3 – 6x3y2 – 7x4 has the term x2y3 and x3y2 which is degree 5

8y6 + y5 – 5xy3 + 7x2y2 – x3y – 6x4 has the term y6 which is degree 6

–6xy5 + 5x2y3 – x3y2 + 2x2y3 – 3xy5 has the term xy5 which is degree 6

nevsk [136]3 years ago

5 0

Answer:

b is your answer

Step-by-step explanation:

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New heat lamps are reported to have the mean lifespan of 100 hours with a standard deviation of 15 hours. Before replacing their

Tom [10]

Answer:

The correct option is C

The correct option is A

The correct option is B

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 100$

The standard deviation is $\sigma = 15$

The sample size is $n = 36$

The sample mean is $\= x = 105.1$

Generally

The null hypothesis is $H_o: \mu = 100 \ hours$

The alternative hypothesis is $H_a : \mu \ne 100\ hours$

Given that the null hypothesis is true then the distribution of sample means $\mu_{\= x }$ , from a sample size of 36 is mathematically represented as

$\mu_{\= x } = \mu$

=> $\mu_{\= x } = 100$

According to the Central Limit Theorem the test stated in the question is approximately normally distributed if the sample size is sufficiently large $(n > 30 )$ so given that the sample size is large n = 36