3 years ago

Look At The Expression Below

Mathematics

1 answer:

givi [52]3 years ago

5 0

All statements that are true about the expression is B. and C.

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An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in Texas. He believes that

tankabanditka [31]

Answer:

1442

Step-by-step explanation:

Given,

Mean is,

$\mu = 20.4$

Standard deviation,

$\sigma = 8.8$ ,

Margin of error(E) = 0.54,

For 98% level of confidence, $z_{\frac{\alpha}{2}} = 2.33$

Thus, the sample size would be,

$n=[\frac{z_{\frac{\alpha}{2}}\times \sigma}{E}]^2$

$=[\frac{2.33\times 8.8}{0.54}]^2$

$=1441.74902606$

$\approx 1442$

6 0

3 years ago

If x-2 is a factor of x^2+3x+k, what is the value of k?

Ne4ueva [31]

Take x-2=0

x=2

put the value of x in the equation

2^2 + 3(2) + k =0
4+6+k=0
10+k=0
k= -10

hope you understand

5 0

3 years ago

What expressions are equivalent to 5^5 over 5^3

andrezito [222]

25 or 5^2 because when you divide two exponents you subtract the exponent parts

7 0

3 years ago

Write an explicit formula for each sequence.<br> 3, 7, 11, 15, ...

Stels [109]

Answer:

f(n)= f(1)+d(n-1)

Step-by-step explanation:

the aerithmetric explict formula is the one above, but im not sure what the question is asking, your difference is 4 btw

8 0

3 years ago

2y + 3y -3y -6(y + 2) = -y + 6

irinina [24]

The answer is y= -6
my apologies if it’s wrong

8 0

3 years ago

Read 2 more answers