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3 years ago

Can you please help me with this l will give you Brainliest.

Mathematics

2 answers:

nydimaria [60]3 years ago

6 0

The value of a number increases when its subtracted by a negative. In the expression 5 - -4, since 4 is a negative integer that’s being subtracted, it’s added to the 5 — which would equal 9.

VARVARA [1.3K]3 years ago

3 0

Answer:

Step-by-step explanation:

Hello

When you have two negative symbols, you have to multiplied them, so:

-*-= +

+*+= +

+*-=-

-*+ = -

You can to do more research lookin this: "Algebraic operations with symbols" or "The sign´s law"

I attached a illustrative image about this.

Then,

5 - (-4) <em>(here is with -*- )</em>

5 + 4

Best regards

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3 years ago

Suppose an automotive repair company wants to determine the current percentage of customers who keep up with regular vehicle mai

Nina [5.8K]

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Step-by-step explanation:

Formula to find the sample size :

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

Given : Confidence level : $(1-\alpha)=0.90$

⇒ significance level = $\alpha= 0.10$

z-value for 90% confidence interval (using z-table)= $z_{\alpha/2}=1.645$

Prior estimate of the population proportion (p) of customers who keep up with regular vehicle maintenance is unknown.

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Hence, the required sample size = 1692

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Bas_tet [7]

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Step-by-step explanation:

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KATRIN_1 [288]

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Can you please help me with this l will give you Brainliest.​

Can you please help me with this l will give you Brainliest.