2 years ago

What are the like terms in the following expression? 9x + 7 + 4x

Mathematics

1 answer:

vichka [17]2 years ago

7 0

Answer:

9x and 4x are like terms

Step-by-step explanation:

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Solve the system of linear equations. (enter your answers as a comma-separated list. if there is no solution, enter no solution.

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There is no system to solve for

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3 years ago

Select the correct answer.<br> Which statement is true?

dusya [7]

Answer:

third option is the correct

Step-by-step explanation:

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2 years ago

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Collect like terms
(2x-x) + (9+3)

Simplify
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2 years ago

Solve: x + 1.5= 5.7<br> How do I solve this?

Mashutka [201]

Answer:

4.2

Step-by-step explanation:

5.7-1.5=4.2

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2 years ago

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It is advertised that the average braking distance for a small car traveling at 65 miles per hour equals 122 feet. A transportat

madreJ [45]

Complete Question

The complete question is shown on the first uploaded image

Answer:

the null hypothesis is $H_o : \mu = 122$

the alternative hypothesis is $H_a : \mu \ne 122$

The test statistics is $t = - 1.761$

The p-value is $p = P(Z < t ) = 0.039119$

$p \ge 0.01$

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 122$

The sample size is n= 38

The sample mean is $\= x = 116 \ feet$

The standard deviation is $\sigma = 21$

Generally the null hypothesis is $H_o : \mu = 122$

the alternative hypothesis is $H_a : \mu \ne 122$

Generally the test statistics is mathematically evaluated as

$t = \frac { \= x - \mu }{\frac{ \sigma }{ \sqrt{n} } }$

substituting values

$t = \frac { 116 - 122 }{\frac{ 21 }{ \sqrt{ 38} } }$

$t = - 1.761$

The p-value is mathematically represented as

$p = P(Z < t )$

From the z- table

$p = P(Z < t ) = 0.039119$

$p \ge 0.01$

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2 years ago