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4 years ago

Experts/ace/geniuses helpp

Mathematics

1 answer:

Alex Ar [27]4 years ago

8 0

Square root 144 = 12 so this is the rational number

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Can somebody help me please

SpyIntel [72]

<h2>Answer:</h2><h3>f(4) = 122</h3>

________________________________________________

<h3>Calculate</h3>

$Substitute\ x=4\ into\\ f(x)=7x^2+4x-6$

_________________________________________________

<h3>Substitute</h3>

$f(4)=7\times 4^2+4\times 4-6$

___________________________________________________

<h3>Calculate the power</h3>

$f(4)=7\times 16+4\times 4-6$

___________________________________________________

<h3>Calculate the product or quotient</h3>

$f(4)=112+4\times 4-6\\ f(4)=112+16-6$

___________________________________________________

<h3>Calculate the sum or difference</h3>

$f(4)=128-6\\ f(4)=122$

<em>I hope this helps you</em>

6 0

3 years ago

Automobile mechanics conduct diagnostic tests on 150 new cars of particular make and model to determine the extent to which they

galben [10]

Answer: 0.0944

Step-by-step explanation:

Given : Sample size of cars : n= 150, sample size is greater than 30 , so we use z-test.

Number of cars tested do have faulty catalytic converters =42

Then the proportion of cars have faulty catalytic converters : $\hat{p}=\dfrac{42}{150}=0.28$

Critical value of z for 99% confidence level : $z_{\alpha/2}=2.576$

Formula for Margin of error :

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

$E=(2.576)\sqrt{\dfrac{0.28(1-0.28)}{150}}\\\\=0.0944377199216\approx0.0944\ \text{Rounded to four decimal places}$

Hence, the required margin of error = $0.0944$

6 0

3 years ago

Whats the common multiple of 12

Anna [14]

12,24,36,48 the least common multiple is 24

4 0

4 years ago

Read 2 more answers

Dee's taxable income last year was $95,850. According to the tax table below, how much tax does she have to pay if she files wit

joja [24]

Answer:

The answer would be $20,565.

Step-by-step explanation:

If you look on the chart you go down to $95,850 and look under the first column since shes filing single.

6 0

3 years ago

Read 2 more answers

Extra practice: Find the sum of the interior angle measures of each polygon.

Leto [7]

Answer: what polygon?

Step-by-step explanation:

8 0

3 years ago