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3 years ago

-6 + (-5) + 7 4 -4 -18 18

Mathematics

2 answers:

Shalnov [3]3 years ago

7 0

Answer: B. -4

Step-by-step explanation:

NeTakaya3 years ago

4 0

-6 + (-5) + 7 =
-6 - 5 + 7 =
-11 + 7 =
-4

Your final answer is -4.

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Please help i dont understand

natita [175]

Answer:

Okay so we need to simplify, which means to find the smallest possible number but for it to be the same.

Step-by-step explanation:

An example is: 12/20 = 3/4

It equals that because 12/20 can be rewritten as 3/4.

Another example is: 24/30 = 4/6

It equals that because 4 can be added into 24 6 times, so it would be written as 4/6.

Another example is: 15/45= 5/15

It equals that because 5 can be fitted into 15 3 times, so the answer is 5/15.

I hope this helps

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4 years ago

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4 years ago

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Serga [27]

Answer:

Step-by-step explanation:

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4 years ago

Read 2 more answers

48% of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually

oksian1 [2.3K]

Answer:

There is no sufficient evidence to support the executive claim

Step-by-step explanation:

From the question we are told that

The population proportion is $p = 0.48$

The sample proportion is $\r p = 0.45$

The sample size is $n = 300$

The level of significance is $\alpha = 0.02$

The null hypothesis is $H_o : p= 0.48$

The alternative hypothesis is $H_a : p \ne 0.48$

Generally the test statistics is mathematically evaluated as

$t = \frac{\r p - p }{ \sqrt{ \frac{p(1 - p )}{n} } }$

=> $t = \frac{0.45 - 0.48 }{ \sqrt{ \frac{0.48 (1 - 0.48 )}{300} } }$

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The p-value is mathematically represented as

$p-value = 2P(z > |-1.04|)$

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=> $p-value = 2 * 0.15$

=> $p-value = 0.3$

Given that $p-value > \alpha$ we fail to reject the null hypothesis

Hence we can conclude that there is no sufficient evidence to support the executive claim

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3 years ago